US20150184960A1 - Muzzle Device for Firearm Having a Gas Operating System - Google Patents
Muzzle Device for Firearm Having a Gas Operating System Download PDFInfo
- Publication number
- US20150184960A1 US20150184960A1 US14/145,739 US201314145739A US2015184960A1 US 20150184960 A1 US20150184960 A1 US 20150184960A1 US 201314145739 A US201314145739 A US 201314145739A US 2015184960 A1 US2015184960 A1 US 2015184960A1
- Authority
- US
- United States
- Prior art keywords
- combustion gas
- barrel
- firearm
- end cap
- bore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
- F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
- F41A5/26—Arrangements or systems for bleeding the gas from the barrel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/32—Muzzle attachments or glands
Definitions
- the gas-port-to-muzzle length is about 7 inches.
- the combustion gas outlet port is about 7.5 inches from the receiver.
- Such a gas system arrangement may be referred to as a carbine-length gas system, which may be used for barrel lengths of 10 to 18 inches.
- FIG. 1 is a side view of a firearm according to the present disclosure
- FIG. 13 is a close-up front perspective view of an end cap of a muzzle device according to the present disclosure.
- FIG. 15 is a front view of the end cap of FIG. 13 ;
- a muzzle device 140 which extends distally relative to the barrel terminal (muzzle) end 137 , mounts to firearm 100 , particularly the barrel 130 thereof.
- muzzle device 140 comprises a hollow body 141 which, as shown, may further comprise a main body 142 and an end cap 180 .
- body 141 may be shown as two separate pieces particularly provided by main body 142 and end cap 180
- body 141 may alternatively be formed as a single unitary (monolithic) piece.
- the barrel retaining pin 152 thereafter holds the barrel 130 and the barrel mounting portion 144 of the muzzle device 140 in stationary, secured position and inhibits the barrel 130 and the main body 142 of muzzle device 140 from rotating relative to one another. More particularly, the barrel retaining pin 152 inhibits the main body 142 of muzzle device 140 from rotating relative to the barrel 130 .
- the volume of the combustion gas (burn) chamber 157 is in a range of 2 to 3 times greater than the volume of the bore 132 of barrel 130 , and more particularly 2.5 times greater than the volume of the bore 132 of barrel 130 , with the volume of the combustion gas (burn) chamber 157 being about 0.68 in 3 (cu in.) and the volume of the bore 132 of barrel 130 being 0.3 in 3 (cu in.).
- Combustion gas (burn) chamber 157 is formed by a longitudinally orientated surrounding (annular) sidewall 160 of the main body 142 , which extends to and defines the distal end 162 of the main body 142 .
- Combustion gas (burn) chamber 157 is also formed by a transverse end wall 182 of end cap 180 .
- the inner contour of the end cap 180 includes an arcuate concave inner gas impingement surface 185 which defines cavity 194 , and forms part of the combustion gas (burn) chamber 157 .
- end cap 180 further includes a center, circular (projectile) orifice 186 which is formed by transverse wall 182 , through which a projectile passes upon the firing of firearm 100 .
- the combustion gas receiving portion 156 of main body 142 further includes a longitudinally oriented bore 166 , which more particularly comprises a counter-bore, which is formed in the shoulder 145 of sidewall 160 of main body 142 .
- end cap retaining pin 200 when linear spring 210 is compressed within bore 170 , end cap retaining pin 200 provides a removable retaining device mounted in the main body 142 which is urged into detent 189 in end cap 180 by the decompression force of the spring 210 .
- end cap retaining pin 200 may first be pushed into bore 168 at the distal end thereof (e.g. by the distal end of a flat screw driver), such that the end cap retaining pin 200 is barely exposed.
- End-cap 180 may be rotated (e.g. threaded clockwise) on to main body 142 .
- end-cap 180 When end-cap 180 has been sufficiently threaded onto main body 142 , the retracted position of end cap retaining pin 200 may be released such that the distal end of the end cap retaining pin 200 contacts shoulder 188 . Thereafter, with continued rotation of end-cap 180 , the end cap retaining pin 200 will be urged into the next detent 189 which passes by the distal end of the end cap retaining pin 200 by the decompression (bias) force of spring 210 , thus inhibiting the end cap 180 from further rotating relative to the main body 142 .
- the combustion gas receiving portion 156 includes a combustion gas (burn) chamber 157 and a combustion gas outlet port 159 , with the combustion gas outlet port 159 arranged to receive combustion gas directly from the combustion gas (burn) chamber 157 and provide the combustion gas directly to combustion gas inlet port 226 of the combustion gas return tube 220 .
- the combustion gas receiving portion 156 includes a combustion gas (burn) chamber 157 and exactly two outlets for the combustion gas, with the two outlets provided by the combustion gas outlet port 159 arranged to receive combustion gas directly from the combustion gas (burn) chamber 157 and provide the combustion gas directly to an inlet port 226 of the combustion gas return tube 220 , and a projectile orifice 186 arranged at a distal end of the body 141 .
- combustion gas return tube 220 delivers the propellant combustion gas into the upper receiver 130 of firearm to cycle the action.
- Propellant combustion gas is vented into the upper receiver 130 as the bolt carrier assembly is driven aft and separates from the combustion gas return tube 220 .
- these contaminates may foul the gas out port 36 formed in barrel 30 , which may lead to erosion as well as inadvertent damage to the barrel 30 during cleaning, such as by scratching the barrel rifling or otherwise damaging the bore 32 , which both shorten barrel life.
- the muzzle device 100 of the present disclosure eliminating the combustion gas outlet port 36 formed in barrel 30 , there is no risk of damaging the bore 132 in such a similar manner.
- muzzle device 100 does not need remain with the firearm 100 during cleaning thereof.
- muzzle device 100 may be removed from the barrel 130 to be cleaned, and simply replaced with a second muzzle device 100 while the first muzzle device 100 is thereafter being cleaned.
- the present disclosure provides for removing muzzle device 140 from firearm 100 by simple mechanical disconnection from the barrel 130 and combustion gas return tube 220 .
- combustion gas (burn) chamber 157 may also operate as a flash suppressor. While not being bound to a particular theory, rifle flash may be understood to be created by excess powder burning when it comes into contact with air after the projectile leaves the bore of the barrel. As such, a flash suppressor may be understood to reduce the flash which may occur as the projectile leaves the firearm, particularly to protect the shooter's eyesight from a quick change in brightness, thus keeping the target in sight and permitting follow-up shots. With combustion gas (burn) chamber 157 , excess power may be trapped in therein, where it may remain until the combustion gas (burn) chamber 157 is cleaned or such burns with sufficient heat.
Abstract
A muzzle device for a firearm comprising a body having a barrel mounting portion and a combustion gas receiving portion, wherein the barrel mounting portion is arranged to mount the muzzle device to a muzzle end of a barrel of the firearm such the combustion gas receiving portion of the muzzle device extends distally from the muzzle end of the barrel, and wherein the combustion gas receiving portion is arranged to capture combustion gas from the barrel of the firearm and provide the combustion gas back to a receiver of the firearm through a combustion gas return tube.
Description
- The present disclosure relates to relates to firearms, and more particularly relates to gas operated semi-automatic and automatic firearms.
- Certain semi-automatic and automatic firearms, such as the family of AR-15/M-16 firearms, may operate with a direct gas impingement system, which may be understood as a type of gas operation system.
- The direct gas impingement system directs hot propellant combustion gas from a fired cartridge directly to a bolt carrier or slide assembly to cycle the action of the firearm. More particularly, propellant combustion gas from the barrel of the firearm travels through a combustion gas outlet port formed in the barrel, and subsequently into a combustion gas return tube which delivers the propellant combustion gas into the upper receiver of the AR-15/M-16 firearm during operation. Propellant combustion gas is vented into the upper receiver as the bolt carrier assembly is driven aft and separates from the combustion gas return tube.
- Unlike gas piston operated firearms, direct impingement does not require a separate gas cylinder, piston, and operating rod assembly. By having high-pressure propellant gas act directly upon the bolt and carrier, the AR-15/M-16 firearms may be provided with lower weight and lower cost than a gas piston operated firearm.
- Unfortunately, one problem of the direct gas impingement system is that the firearm becomes fouled more quickly. The venting of the propellant combustion gas becomes a problem because the propellant combustion gas carries contaminates such as vaporized metals, carbon and gaseous residues which may contact cooler operating parts of the firearm and condense thereon. The deposits may then increase friction on the bolt's camming system, which may lead to jamming.
- As a result, thorough and frequent cleaning of the upper and lower receivers of AR-15/M-16 firearms is required to better ensure reliability. Furthermore, components of the direct gas impingement system outside the receivers, such as the combustion gas outlet port of the barrel, the combustion gas block and the combustion gas return tube used to deliver the combustion gas into the receiver area, must also be thoroughly cleaned. When these components, certain of which may be difficult to access and clean, become constricted over time, such may result in a lower gas pressure acting on the bolt and carrier which may be insufficient to cycle the action of the firearm, and once again result in jamming.
- In addition to the combustion gas outlet port on the barrel becoming fouled, another problem with the AR-15/M-16 firearms has been the specific location of the combustion gas outlet port for the direct gas impingement system to operate properly. The direct gas impingement system of AR-15/M-16 firearms may be understood to have been originally designed for a rifle length barrel having a barrel length of about 20 inches. The barrel includes a combustion gas outlet port formed at about 12.5 inches from the receiver, leaving a barrel length of about 7.5 inches after the combustion gas outlet port, which may be understood as the gas-port-to-muzzle length of the barrel. With the foregoing arrangement, the pressure of the combustion gas passing through the combustion gas outlet port to cycle the action of the AR-15/M-16 rifle peaks in a range of 20,000 to 25,000 psi.
- Over the years, the AR-15/M-16 barrel has gotten shorter as manufacturers have sought to configure the AR-15/M16 rifle to fit different end user needs, such as by providing both carbine and pistol versions. Unfortunately, shortening the barrel of the AR-15/M16 firearms and changing the location of the combustion gas outlet port results on changing the operation of the direct gas impingement system. The placement and size of the combustion gas outlet port, as well as the length of the barrel between the combustion gas outlet port and the terminal (muzzle) end of the barrel, i.e. the gas-port-to-muzzle length, are an integral part of the operating system design.
- More particularly, the distance of the combustion gas outlet port from the firing chamber, along with the diameter of the barrel interior, the charge of the cartridge and the size of the gas port, largely determine the combustion gas pressure entering the combustion gas outlet port as the projectile passes the outlet port. Furthermore, the distance of the combustion gas outlet port from the firing chamber and the distance of the gas path back to the bolt carrier determines the initial gas timing, while the distance from the gas outlet port to the end of the barrel, i.e. the gas-port-to-muzzle length, determines the duration of the gas system pressure.
- Thus, given that combustion gas pressure drops as the projectile travels down the barrel, if the combustion gas outlet port is placed too far aft in the barrel, the combustion gas pressures may be greater than necessarily to cycle the action, and may result in premature wear and other damage to the firearm. On the other hand, if the combustion gas outlet port is placed too far down the barrel, the combustion gas pressures may not be sufficient to cycle the action, or of long enough duration (combustion gas pressure in the barrel drops to zero when the projectile exits the barrel) to cycle the action.
- More particularly, the time the projectile remains in the barrel, after passing the combustion gas port, may be referred to as the “dwell” or “dwell time.” Thus, dwell, or dwell time, may be understood as the period that the gas operating system maintains pressure to continue the cycling of the firearm. For a conventional AR-15/M-16, the dwell may be measured from the time the projectile passes the combustion gas outlet port in the barrel to the time the projectile exits the barrel terminal (muzzle) end. Consequently, if the combustion gas outlet port is placed too far down the barrel, resulting in insufficient dwell period, the combustion gas pressures will not have sufficient time to cycle the action.
- In contrast to an AR-15/M-16 rifle, for an AR-15/M-16 carbine with a barrel length of about 14.5 inches, the gas-port-to-muzzle length is about 7 inches. As a result, it may be understood that the combustion gas outlet port is about 7.5 inches from the receiver. Such a gas system arrangement may be referred to as a carbine-length gas system, which may be used for barrel lengths of 10 to 18 inches. With the foregoing arrangement, the pressure of the combustion gas passing through the combustion gas outlet port for the AR-15/M-16 carbine peaks in a range of 30,000 to 35,000 psi.
- Consequently, all things being equal, as a result of the combustion gas outlet port being moved aft, the combustion gas pressures experienced by the AR-15/M-16 carbine during cycling of the action are significantly increased as compared to the AR-15/M-16 rifle, which may be understood to place greater stress on the AR-15/M-16 carbine, and the potential for greater wear as well as damage.
- Moreover, the combustion gas operating pressures are significantly greater as the barrel continues to get shorter. For example, for an AR-15/M-16 pistol with a barrel length of about 7.5 inches, the gas-port-to-muzzle length is about 3 inches. As a result, it may be understood that the combustion gas outlet port is about 4.5 inches from the receiver. Such a gas system arrangement may be referred to as a pistol-length gas system, which may be used for barrel lengths under 10 inches. With the foregoing arrangement, the pressure of the combustion gas passing through the combustion gas outlet port for the AR-15/M-16 pistol peaks in a range of 50,000 to 55,000 psi.
- As a result, for AR-15/M-16 pistol with a 7.5 inch barrel, the combustion gas pressures experienced by the pistol during cycling the action may be understood to be significantly greater than even those of the AR-15/M-16 carbine. Furthermore, the dwell may be expected to be significantly lower as the gas-port-to-muzzle length is about 3 inches as opposed to the 7 inch gas-port-to-muzzle length of the AR-15/M-16 carbine. As a result, the AR-15/M-16 pistol must not only cycle with significantly greater operating pressures while cycling the action, but also must cycle the action faster.
- Unfortunately, the higher operational pressures associated with the AR-15/M-16 carbine, and more particularly the AR-15/M-16 pistol, may result in the use of heavier duty/heavier weight components. Such may also result in decreased reliability and a decreased useful life of the firearm. Furthermore, the AR-15/M-16 carbine, and more particularly the AR-15/M-16 pistol, may be understood to suffer from greater fouling issues given the shorter length of the gas impingement system.
- What is needed is a direct gas impingement system to cycle the action of a shorter barrel firearm, such as the AR-15/M-16 carbine and the AR-15/M-16 pistol, at lower pressure/forces which results in placing less stress on the firearm, as well a gas operating system which offers increased ability to clean the firearm of combustion gas contaminates.
- A muzzle device for a firearm is provided, with the muzzle device comprising a body having a barrel mounting portion and a combustion gas receiving portion, wherein the barrel mounting portion is arranged to mount the muzzle device to a muzzle end of a barrel of the firearm such the combustion gas receiving portion of the muzzle device extends distally from the muzzle end of the barrel, and wherein the combustion gas receiving portion is arranged to capture combustion gas from the barrel of the firearm and provide the combustion gas back to a receiver of the firearm through a combustion gas return tube.
- The above-mentioned and other features of this disclosure, and the manner of attaining them, will become more apparent and better understood by reference to the following description of embodiments described herein taken in conjunction with the accompanying drawings, wherein:
-
FIG. 1 is a side view of a firearm according to the present disclosure; -
FIG. 2 is a front perspective view of the firearm ofFIG. 1 ; -
FIG. 3 is a bottom perspective view of the firearm ofFIG. 1 ; -
FIG. 4 is a rear perspective view of the firearm ofFIG. 1 ; -
FIG. 5 is a top view of the upper receiver of the firearm ofFIG. 1 ; -
FIG. 6 is a cross-sectional side view of the upper receiver of the firearm ofFIG. 1 taken along line 6-6 ofFIG. 5 ; -
FIG. 7A is a close-up cross-sectional side view of the distal end portion of the upper receiver ofFIG. 6 bounded by circle B which includes a muzzle device according to the present; -
FIG. 7B is a close-up cross-sectional side view of the distal end portion of the upper receiver ofFIG. 6 bounded by circle B which includes the muzzle device ofFIG. 7A with a projectile and combustion gas therein; -
FIG. 8 is a close-up front perspective view of a main body of a muzzle device according to the present disclosure; -
FIG. 9 is a close-up rear perspective view of the main body ofFIG. 8 ; -
FIG. 10 is a longitudinal cross-sectional view of the main body ofFIG. 8 ; -
FIG. 11 is a cross-sectional view of the main body ofFIG. 10 taken along line 11-11; -
FIG. 12 is a cross-sectional view of the main body ofFIG. 10 taken along line 12-12; -
FIG. 13 is a close-up front perspective view of an end cap of a muzzle device according to the present disclosure; -
FIG. 14 is a close-up rear perspective view of the end cap ofFIG. 13 ; -
FIG. 15 is a front view of the end cap ofFIG. 13 ; -
FIG. 16 is a cross-sectional view of the end cap ofFIG. 15 taken along line 16-16; and -
FIG. 17 is a cross-sectional view of a barrel and gas tube assembled with a gas block of the prior art. - It may be appreciated that the present disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention(s) herein may be capable of other embodiments and of being practiced or being carried out in various ways. Also, it may be appreciated that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting as such may be understood by one of skill in the art.
- Referring now to
FIGS. 1-4 , there is shown afirearm 100 which may include amuzzle device 140 according to the present disclosure. As shown, thefirearm 100 may comprise a gas-operated semi-automatic or automatic firearm, and more particularly a direct gas impingement gas-operated semi-automatic or automatic firearm. As explained in greater detail below, with a direct gas impingement gas-operated firearm, the direct gas impingement system may be understood to direct hot propellant combustion gas from a fired cartridge directly to the bolt carrier or slide assembly of the receiver to cycle the action of the firearm. - Even more particularly,
firearm 100 may be a member of the family of AR-15/M-16 firearms, which may include the AR-10, AR-15, M16, M16A1, M16A2, M16A3, M16A4, M4, M4A1, CAR-15, etc. Furthermore,firearm 100 may be categorized as a rifle, a carbine, a mid-length or a pistol, particularly depending on barrel length. As shown inFIG. 1 ,firearm 100 is shown to be an AR-15/M-16 pistol with a shoulder stock, particularly configured to operate with the 5.56×45 mm NATO military cartridge. Other exemplary calibers may include the 5.56/.223 Remington, 300 Blackout, 0.308 Win/7.62×51, 5.45×39, 7.62×39, 458 SOCOM, and 0.50 Beowulf. - As best shown in
FIGS. 1 and 3 ,firearm 100 comprises a receiver which may be sectioned into alower receiver 110 and anupper receiver 120. Thelower receiver 110 includes the fire control group, grip and butt (shoulder) stock assembly. Theupper receiver 120 includes the barrel, bolt carrier group, charging handle, sights, gas system and muzzle device. - Referring now to
FIGS. 5 and 6 , there is shown theupper receiver 120 offirearm 100 includingbarrel 130 andmuzzle device 140 according to the present disclosure. - As best shown in
FIG. 7A ,barrel 130 offirearm 100 includes abore 132 defined bybarrel wall 133. A distal end steppedportion 134 of thebarrel wall 133 decreases in thickness and diameter via a step down such that a narrow (neck)portion 135 is created at the distal end of thebarrel 130. As shown, the narrow (neck)portion 135 terminates proximally atshoulder 136. As used herein, it should be understood that the terms “proximal” and “distal” are made in reference to the longitudinal length offirearm 100 with themuzzle device 130 being at the distal end of thefirearm 100, and the butt/stock being at the proximal end of thefirearm 100. - A
muzzle device 140, which extends distally relative to the barrel terminal (muzzle)end 137, mounts tofirearm 100, particularly thebarrel 130 thereof. As shown inFIG. 7 , as well asFIGS. 8-16 which provide additional views,muzzle device 140 comprises ahollow body 141 which, as shown, may further comprise amain body 142 and anend cap 180. Thus, it should be understood that whilebody 141 may be shown as two separate pieces particularly provided bymain body 142 andend cap 180,body 141 may alternatively be formed as a single unitary (monolithic) piece.Body 141, and more particularlymain body 142 andend cap 180, may be fabricated from a suitable gun metal. -
Body 141 comprises abarrel mounting portion 144 and a combustiongas receiving portion 156. As such,barrel mounting portion 144 mounts themuzzle device 140 to the barrel terminal (muzzle) end 137 of abarrel 130 of thefirearm 100 such that the combustiongas receiving portion 156 of themuzzle device 140 extends distally from the barrel terminal (muzzle) end 137 of thebarrel 130. - As shown,
barrel mounting portion 144 is provided bymain body 142.Barrel mounting portion 144 is adapted to removably connectmuzzle device 140 tobarrel 130. As shown, due to the deceased outer size (diameter) ofbarrel mounting portion 144 relative to combustiongas receiving portion 156, ashoulder 145 is provided with combustiongas receiving portion 156, into which combustiongas return tube 220 extends. -
Barrel mounting portion 144 includes a longitudinally orientedbarrel mounting bore 146, which more particularly comprises a counter-bore which is defined bysidewall 147 ofbarrel mounting portion 144, which receives the distal end steppedportion 134 ofbarrel 130. As shown, the narrow (neck)portion 135 of thebarrel 130 connects with thenarrow portion 148 of the counter-bore 146 via threaded engagement. More particularly, external (male)threads 138 of narrow (neck)portion 135 of thebarrel 130 threadably engage with the internal (female)threads 150 of thenarrow portion 148 of the counter-bore 146. - Once the
barrel 130 and thebarrel mounting portion 144 of themuzzle device 140 are suitably secured and properly oriented to one another, such are secured in position by a removable retaining device. As shown, the removable retaining device comprises a tapered, cylindrical (barrel) retainingpin 152 which is inserted into a tapered, cylindrical through-hole formed by opposingsemi-circular recesses barrel 130 and thebarrel mounting portion 144, respectively. As shown, the opposingsemi-circular recesses barrel 130 and themuzzle device 140. - The
barrel retaining pin 152 thereafter holds thebarrel 130 and thebarrel mounting portion 144 of themuzzle device 140 in stationary, secured position and inhibits thebarrel 130 and themain body 142 ofmuzzle device 140 from rotating relative to one another. More particularly, thebarrel retaining pin 152 inhibits themain body 142 ofmuzzle device 140 from rotating relative to thebarrel 130. - As set forth above,
muzzle device 140 further comprises a combustiongas receiving portion 156, which is formed bybody 141, and more particularlymain body 142 andend cap 180. The combustiongas receiving portion 156 is arranged to capture combustion gas expelled from thebarrel 130 of thefirearm 100 and provide the combustion gas back to receiver, hereupper receiver 120 of thefirearm 100, through combustiongas return tube 220. The combustion gas is then used to cycle the action offirearm 100. As explained in greater detail below, combustiongas receiving portion 156 comprises an enlarged combustion gas (burn)chamber 157 which is provided bycavity 158 formed inmain body 142 andcavity 194 formed inend cap 180. As explained in greater detail below, for the 5.56×45 mm cartridge with a 7.5 inch barrel, the volume of the combustion gas (burn)chamber 157 is in a range of 2 to 3 times greater than the volume of thebore 132 ofbarrel 130, and more particularly 2.5 times greater than the volume of thebore 132 ofbarrel 130, with the volume of the combustion gas (burn)chamber 157 being about 0.68 in3 (cu in.) and the volume of thebore 132 ofbarrel 130 being 0.3 in3 (cu in.). - As shown,
counter-bore 146 ofbarrel mounting portion 144 opens intocavity 158 ofmain body 142. As such, thebore 132 ofbarrel 130 is in fluid communication withcavities main body 142 andend cap 180, respectively. - Combustion gas (burn)
chamber 157 is formed by a longitudinally orientated surrounding (annular) sidewall 160 of themain body 142, which extends to and defines thedistal end 162 of themain body 142. Combustion gas (burn)chamber 157 is also formed by atransverse end wall 182 ofend cap 180. As shown, the inner contour of theend cap 180 includes an arcuate concave innergas impingement surface 185 which definescavity 194, and forms part of the combustion gas (burn)chamber 157. As shown,end cap 180 further includes a center, circular (projectile)orifice 186 which is formed bytransverse wall 182, through which a projectile passes upon the firing offirearm 100. For the 5.56×45 mm cartridge, the center (projectile)orifice 186 has a diameter which is in a range of 1.1 to 1.3 times greater than the diameter of thebore 132 ofbarrel 130, and more particularly 1.2 times greater than the diameter of thebore 132 ofbarrel 130, with the diameter of the center (projectile)orifice 186 having a diameter of 0.272 inch and thebore 132 having a diameter of 0.223 inch. -
End cap 180 removably connects to themain body 142 at the distal end thereof, particularly by a mechanical connection. More particularly,main body 142 andend cap 180 connect by threaded engagement. Even more particularly, external (male)threads 184 onsidewall 181 ofend cap 180 threadably engage with the internal (female)threads 164 onsidewall 160 of themain body 142. - The
end cap 180 may further include a perimetercircular shoulder 188 which extends distally relative to thetransverse end wall 182, which results in acircular recess 192 being formed in the outer contour of theend cap 180. As shown, the bottom of thecircular recess 192, which is formed by theouter surface 183 of thetransverse wall 182, is planar. The distal end of the peripheral wall may include a plurality of pointed raisedprojections 190, which may be used to shatter glass. - Along an upper side of the muzzle device 140 (along the top of the firearm 100), the combustion
gas receiving portion 156 ofmain body 142 further includes a longitudinally oriented bore 166, which more particularly comprises a counter-bore, which is formed in theshoulder 145 ofsidewall 160 ofmain body 142. - As shown, counter-bore 166 contains an end
cap retaining pin 200, aspring 210 and a combustiongas return tube 220. Ashaft 204 of the endcap retaining pin 200 extends through the narrowdistal portion 168 of the counter-bore 166, while ahead 202 of the endcap retaining pin 200 is retained in the widerproximal portion 170 of the counter-bore 166. A distal end portion ofshaft 204 may enter adetent 189 of theend cap 180 to inhibit theend cap 180 from rotating relative to themain body 142. - After end
cap retaining pin 200 is inserted incounter-bore 166,spring 210 is then inserted into widerproximal portion 170 of the counter-bore 166, with one end thereof in contact with thehead 202 of the endcap retaining pin 200. Afterspring 210 is inserted into the counter-bore 166, combustiongas return tube 220 is inserted intocounter-bore 166 with a distal end of the combustiongas return tube 220 in contact with the opposing end ofspring 210. - Combustion
gas return tube 220 is adapted to removably connect to muzzledevice 140. Once the combustiongas return tube 220 is properly positioned and orientated incounter-bore 166, a transverse through hole formed in the combustiongas return tube 220 aligns with a transverse through hole formed in themain body 142. A removable retaining device such as aremovable retaining pin 172 is then inserted into the two holes which holds the combustiongas return tube 220 and themain body 142 in stationary position and inhibits the combustiongas return tube 220 and themain body 142 from separating and rotating relative to one another. More particularly, the retainingpin 172 inhibits the combustiongas return tube 220 from rotating relative to themain body 142. The retainingpin 172 may be threaded, such as that of a screw. - Furthermore, with the foregoing construction, when
linear spring 210 is compressed withinbore 170, endcap retaining pin 200 provides a removable retaining device mounted in themain body 142 which is urged intodetent 189 inend cap 180 by the decompression force of thespring 210. As such, during assembly ofend cap 180 tomain body 142, endcap retaining pin 200 may first be pushed intobore 168 at the distal end thereof (e.g. by the distal end of a flat screw driver), such that the endcap retaining pin 200 is barely exposed. End-cap 180 may be rotated (e.g. threaded clockwise) on tomain body 142. When end-cap 180 has been sufficiently threaded ontomain body 142, the retracted position of endcap retaining pin 200 may be released such that the distal end of the endcap retaining pin 200contacts shoulder 188. Thereafter, with continued rotation of end-cap 180, the endcap retaining pin 200 will be urged into thenext detent 189 which passes by the distal end of the endcap retaining pin 200 by the decompression (bias) force ofspring 210, thus inhibiting theend cap 180 from further rotating relative to themain body 142. - When it is desirable to remove end-
cap 180 frommain body 142, endcap retaining pin 200 may then again be held in a retracted position and end-cap 180 rotated (e.g. threaded counter-clockwise) until end-cap 180 separates frommain body 142. - Alternatively, the end
cap retaining pin 200 and the shape of thedetent 189 may be such that when end-cap 180 is rotated ontomain body 142, theshoulder 188 of the end-cap 180 forces the endcap retaining pin 200 to retract without need of a separate tool. - As shown, combustion
gas return tube 220 includes a combustion gas return tube bore 222 defined by combustion gasreturn tube wall 224. Combustiongas return tube 220 further includes a combustiongas inlet port 226 formed as a cylindrical aperture located in thewall 224 of combustiongas return tube 220. Combustiongas inlet port 226 is in fluid communication with a combustiongas outlet port 159 formed inmain body 142, which is formed adjacent arear wall 161 of the combustion gas (burn)chamber 157, which is shown to be planar. Moreover, as shown, combustiongas outlet port 159 is actually part of through-bore 174, which permits easily cleaning ofgas outlet port 159 when combustiongas return tube 220 is removed fromcounter-bore 166. Combustiongas outlet port 159 and combustiongas inlet port 226 may have a diameter in a range of 0.100 inch to 0.110 inch and more particularly 0.0.104 inch. - Thus, the combustion
gas receiving portion 156 includes a combustion gas (burn)chamber 157 and a combustiongas outlet port 159, with the combustiongas outlet port 159 arranged to receive combustion gas directly from the combustion gas (burn)chamber 157 and provide the combustion gas directly to combustiongas inlet port 226 of the combustiongas return tube 220. - More particularly, the combustion
gas receiving portion 156 includes a combustion gas (burn)chamber 157 and exactly two outlets for the combustion gas, with the two outlets provided by the combustiongas outlet port 159 arranged to receive combustion gas directly from the combustion gas (burn)chamber 157 and provide the combustion gas directly to aninlet port 226 of the combustiongas return tube 220, and aprojectile orifice 186 arranged at a distal end of thebody 141. - As set forth above,
firearm 100 may comprise a gas-operated semi-automatic or automatic firearm, and more particularly a direct gas impingement gas-operated firearm in which the direct gas impingement system directs hot propellant combustion gas from a fired cartridge directly to the bolt carrier or slide assembly of theupper receiver 120 to cycle the action of thefirearm 100. - More particularly, as shown in
FIG. 7B , propellant combustion gas from thebore 132 ofbarrel 130 is received into combustion gas (burn)chamber 157. Without being bound to a particular theory, it is believed that as soon as projectile 250 clears the barrel terminal (muzzle)end 137, the hot propellant combustion gas, as shown by the arrows, will expand on either side of the projectile 250 to the size of the combustion gas (burn)chamber 157. A portion of the combustion gas may then follow thearcuate surface 185 ofend cap 180 and be redirected proximally due to the curvature ofsurface 185. This may be understood to increase the pressure in combustion gas (burn)chamber 157, along with the dwell. - Due to the pressure in combustion gas (burn)
chamber 157, the combustion gas then travels through combustiongas outlet port 159 into combustiongas inlet port 226 and into combustion gas return tube bore 222 of combustiongas return tube 220. As best shown inFIG. 6 , combustiongas return tube 220 delivers the propellant combustion gas into theupper receiver 130 of firearm to cycle the action. Propellant combustion gas is vented into theupper receiver 130 as the bolt carrier assembly is driven aft and separates from the combustiongas return tube 220. With the foregoing construction offirearm 100, certain advantages are realized over the art. - With a conventional AR-15/M-16 rifle, shown as
firearm 10 inFIG. 17 , propellant combustion gas from thebore 32 ofbarrel 30 travels into a combustiongas outlet port 36 formed thebarrel 30. Thereafter, the combustion gas travels into agas transfer port 44 located in agas block 40 mounted on top of thebarrel 30. From thegas transfer port 44 of thegas block 40, the combustion gas then travels into combustiongas inlet port 56 and combustion gas return tube bore 52 of combustiongas return tube 50. In addition to thegas block 50, thebarrel 30 includes aflash hider 60 mounted to the barrel terminal (muzzle)end 37. - In contrast to the prior art, the
muzzle device 140 of the present disclosure eliminates the need for aseparate gas block 40, as well as a combustiongas outlet port 36 being formed in thewall 34 of thebarrel 30 as known in the art, which must be precision drilled and finished. Furthermore, themuzzle device 100 of the present disclosure does not encounter the cleaning concerns encountered with a combustiongas outlet port 36 formed in thebarrel 30. As set forth above, propellant combustion gas may be understood to carry contaminates such as vaporized metals, carbon and residues. As such, these contaminates may foul the gas outport 36 formed inbarrel 30, which may lead to erosion as well as inadvertent damage to thebarrel 30 during cleaning, such as by scratching the barrel rifling or otherwise damaging thebore 32, which both shorten barrel life. In contrast, with themuzzle device 100 of the present disclosure eliminating the combustiongas outlet port 36 formed inbarrel 30, there is no risk of damaging thebore 132 in such a similar manner. - Also importantly,
muzzle device 100 does not need remain with thefirearm 100 during cleaning thereof. In other words,muzzle device 100 may be removed from thebarrel 130 to be cleaned, and simply replaced with asecond muzzle device 100 while thefirst muzzle device 100 is thereafter being cleaned. The present disclosure provides for removingmuzzle device 140 fromfirearm 100 by simple mechanical disconnection from thebarrel 130 and combustiongas return tube 220. - In contrast, with combustion
gas outlet port 36 formed inbarrel 30 of afirearm 10 of the prior art, such must generally be cleaned with the remainder of thefirearm 10, unless thefirearm 10 is substantially broken down to remove thebarrel 30. In either case, cleaninggas outlet port 36 formed inbarrel 30 offirearm 10 may be understood to take longer than removing and replacingmuzzle device 140 onfirearm 100. As such,firearm 100 may be made more readily available in emergency situations. - In addition, the amount of contaminates received into the
receiver 130 offirearm 100 may be reduced with use ofmuzzle device 100 as compared to a prior art gas operating system which makes use of a gas outport 36 formed in thebarrel 30. Due to the large surface area of the combustion gas (burn)chamber 157, certain contaminates within the combustion gas may collect in the combustion gas (burn)chamber 157 rather than passing through the combustiongas outlet port 159 and combustiongas return tube 220 toreceiver 130. Moreover, contaminates which may be captured in may be easily removed from the combustion gas (burn)chamber 157 simply be removingend cap 180 frommain body 142 and cleaning the combustion gas (burn)chamber 157. - Furthermore, combustion gas (burn)
chamber 157 may also operate as a flash suppressor. While not being bound to a particular theory, rifle flash may be understood to be created by excess powder burning when it comes into contact with air after the projectile leaves the bore of the barrel. As such, a flash suppressor may be understood to reduce the flash which may occur as the projectile leaves the firearm, particularly to protect the shooter's eyesight from a quick change in brightness, thus keeping the target in sight and permitting follow-up shots. With combustion gas (burn)chamber 157, excess power may be trapped in therein, where it may remain until the combustion gas (burn)chamber 157 is cleaned or such burns with sufficient heat. - Moreover,
muzzle device 100 may enable the afirearm 100, such as an AR-15/M-16 carbine, and more particularly an AR-15/M-16 pistol, to make use of a longer gas system to reduce the operating pressures during the cycling of the action. For example,muzzle device 100 may enable an AR-15/M-16 carbine to make use of a rifle-length gas system, and my enable an AR-15/M-16 pistol to make use of a carbine-length gas system. Furthermore, the combustion gas (burn)chamber 157 may mediate the pressure spike and smooth out the action thus reducing wear. - With the present disclosure, it has been found that, due to the cross-sectional increase of the combustion gas (burn)
chamber 157 as compared to thebore 132 ofbarrel 130, the longitudinal distance between the combustiongas outlet port 159 and the end cap center (projectile)orifice 186 may be greatly shortened (as compared to the longitudinal distance between the combustiongas outlet port 36 and the barrel terminal (muzzle) end 37 of a traditional AR-15/M-16 ofFIG. 17 ), while maintaining the necessary dwell to operate thefirearm 100. Furthermore, the use of combustion gas (burn)chamber 157 has been found to provide a smoother, softer cycling of the action offirearm 100 and mediate the pressure spike of the fired projectile. - In order to provide the necessary dwell for
muzzle device 100, after a certain amount of testing, for a AR-15/M-15 5.56×45 mm cartridge and a 7.5 inch barrel, the volume of the combustion gas (burn)chamber 157 was sized to be equivalent to the volume of thebore 32 of arifle barrel 30 of about 18 inches, such resulting in a total volume equal to that of a 25 inch barrel when the 7.5 inch pistol barrel is added thereto. As set forth above, the volume of the combustion gas (burn)chamber 157 is about 2.5 times greater than the volume of thebore 132 ofbarrel 130, with the volume of the combustion gas (burn)chamber 157 being about 0.68 in3 (cu in.) and the volume of thebore 132 ofbarrel 130 being 0.3 in3 (cu in.). - As set forth above, for an AR-15/M-16 pistol with a barrel length of about 7.5 inches, the conventional gas-port-to-muzzle length is about 3 inches, and the combustion gas outlet port is about 4.5 inches from the receiver. Furthermore, the end of the barrel generally includes a conventional flash hider attached thereto, making the overall barrel length about 10 inches.
- However, when the
muzzle device 140 of the present disclosure replaces a conventional flash hider, the combustiongas return tube 220 is now mounted to themuzzle device 140 and no longer thebarrel 130. As such, given that the barrel length about 7.5 inches for an AR-15/M-16 pistol, it is now possible to mount a carbine-length gas system to the AR-15/M-16 pistol, whereby the combustiongas outlet port 159 is now about 7.5 inches from the receiver. - As a result of the combustion
gas return tube 220 now being mounted to themuzzle device 140 and no longer to thebarrel 130, the gas operational pressures of the AR-15/M-16 pistol are decreased particularly given the combustiongas outlet port 159 is moved distally. As a result, the stress on thefirearm 100 during firing and the potential for wear as well as damage are all decreased. More particularly, with use ofmuzzle device 140, the pressure of the combustion gas passing through the combustiongas outlet port 159 for the AR-15/M-16 pistol drops from a peak of about 50,000 psi to about 20,000 psi, which is comparable to an AR-16/M-16 rifle. Moreover, the gas pressure in thegas return tube 220 going to the bolt may be in a range of 8,000 psi. to 12,000 psi., and more particularly in a range of 9,000 psi to 10,000 psi. - Such a gas pressure in the gas return tube 220 (of 9,000 psi to 10,000 psi.) may be achieved with the foregoing relationship between the combined the volume of the
bore 132 ofbarrel 130 and volume of the combustion gas (burn)chamber 157 and the diameter of the combustiongas outlet port 159/combustiongas inlet port 226 having in a range of 0.100 inch to 0.110 inch and more particularly 0.0.104 inch. The pressure may be measured using any of the known techniques, including the copper crusher method, piezo method and strain gauge method. - While a preferred embodiment of the present invention(s) has been described, it should be understood that various changes, adaptations and modifications can be made therein without departing from the spirit of the invention(s) and the scope of the appended claims. The scope of the invention(s) should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims along with their full scope of equivalents. Furthermore, it should be understood that the appended claims do not necessarily comprise the broadest scope of the invention(s) which the applicant is entitled to claim, or the only manner(s) in which the invention(s) may be claimed, or that all recited features are necessary.
-
- 100 firearm
- 110 lower receiver
- 120 upper receiver
- 130 barrel
- 132 barrel bore
- 133 barrel wall
- 134 barrel distal end stepped portion
- 135 barrel narrow (neck) portion
- 136 barrel shoulder
- 137 barrel terminal (muzzle) end
- 138 barrel external (male) threads
- 139 barrel semi-circular recess
- 140 muzzle device
- 141 body
- 142 main body
- 144 barrel mounting portion
- 145 combustion gas receiving portion shoulder
- 146 barrel mounting portion bore (counter-bore)
- 147 barrel mounting portion sidewall
- 148 barrel mounting portion counter-bore narrow portion
- 150 barrel mounting portion counter-bore (female) threads
- 152 barrel retaining pin
- 154 barrel mounting portion semi-circular recess
- 156 combustion gas receiving portion
- 157 enlarged combustion gas (burn) chamber
- 158 cavity of main body
- 159 combustion gas outlet port
- 160 main body sidewall
- 161 rear wall of combustion gas burn chamber
- 162 main body distal end
- 164 main body distal (female) threads
- 166 combustion gas receiving portion bore
- 168 combustion gas receiving portion counter-bore narrow portion
- 170 combustion gas receiving portion counter-bore wide portion
- 172 retaining pin
- 174 through-bore in main body
- 180 end cap
- 181 end cap sidewall
- 182 transverse end wall
- 183 outer surface of transverse wall
- 184 end cap (male) threads
- 185 inner gas impingement surface of transverse wall
- 186 end cap center (projectile) orifice
- 188 end cap shoulder
- 189 end cap detents
- 190 end cap projections
- 192 end cap circular recess
- 194 cavity of end cap
- 200 end cap retaining pin
- 202 head
- 204 shaft
- 210 spring
- 220 combustion gas return tube
- 222 combustion gas return tube bore
- 224 combustion gas return tube wall
- 226 combustion gas return tube inlet port
- 250 projectile
Claims (20)
1. A muzzle device for a firearm, comprising:
a body comprising a barrel mounting portion and a combustion gas receiving portion;
the barrel mounting portion to mount the muzzle device to a muzzle end of a barrel of the firearm such that the combustion gas receiving portion of the muzzle device extends distally from the muzzle end of the barrel; and
the combustion gas receiving portion arranged to capture combustion gas from the barrel of the firearm and provide the combustion gas back to a receiver of the firearm through a combustion gas return tube.
2. The device of claim 1 wherein:
the combustion gas receiving portion includes a combustion gas chamber and a combustion gas outlet port; and
the combustion gas outlet port arranged to receive combustion gas directly from the combustion gas chamber and provide the combustion gas directly to an inlet port of the combustion gas return tube.
3. The device of claim 2 wherein:
the combustion gas outlet port is arranged adjacent a rear wall of the combustion gas chamber.
4. The device of claim 2 wherein:
the combustion gas outlet port is part of a through-bore formed in the body.
5. The device of claim 2 wherein:
a distal end of the combustion gas chamber is defined by a transverse wall of the body; and
the transverse wall has an arcuate inner surface.
6. The device of claim 5 wherein:
the barrel of the firearm has a bore with a diameter;
the transverse wall defines a projectile orifice for a projectile fired by the firearm to exit the muzzle device, the projectile orifice being circular and having a diameter; and
the projectile orifice diameter is greater than the bore diameter in a range of 1.1 to 1.3 times the bore diameter.
7. The device of claim 1 wherein:
the combustion gas receiving portion includes a combustion gas chamber and exactly two outlets for the combustion gas; and
the two outlets provided by a combustion gas outlet port arranged to receive combustion gas directly from the combustion gas chamber and provide the combustion gas directly to an inlet port of the combustion gas return tube, and a projectile orifice arranged at a distal end of the body.
8. The device of claim 1 wherein:
the body comprises a main body and an end cap.
9. The device of claim 8 wherein:
the main body and the end cap are connected by a mechanical connection.
10. The device of claim 9 wherein:
the main body and the end cap are connected by threaded engagement.
11. The device of claim 8 further comprising:
a retaining device which inhibits the main body and the end cap from rotating relative to one another.
12. The device of claim 11 wherein:
the retaining device comprises a end cap retaining pin mounted in the main body which is configured to be urged into a detent formed in the end cap.
13. The device of claim 12 wherein:
the end cap retaining pin is spring biased by a linear spring.
14. The device of claim 1 wherein:
the body comprises a bore to receive the combustion gas return tube.
15. The device of claim 1 further comprising:
a retaining device which inhibits the body and the combustion gas return tube from separating relative to one another.
16. The device of claim 15 wherein:
the retaining device comprises a combustion gas return tube retaining pin.
17. The device of claim 1 wherein:
the barrel mounting portion is threaded.
18. The device of claim 1 wherein:
the barrel mounting portion comprises a bore to receive a distal end portion of the barrel.
19. The device of claim 1 further comprising:
a retaining device which inhibits the body and the barrel from rotating relative to one another.
20. The device of claim 19 wherein:
the retaining device comprises a barrel retaining pin.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/145,739 US20150184960A1 (en) | 2013-12-31 | 2013-12-31 | Muzzle Device for Firearm Having a Gas Operating System |
PCT/US2014/072944 WO2015147944A2 (en) | 2013-12-31 | 2014-12-31 | Muzzle device for firearm having a gas operating system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/145,739 US20150184960A1 (en) | 2013-12-31 | 2013-12-31 | Muzzle Device for Firearm Having a Gas Operating System |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150184960A1 true US20150184960A1 (en) | 2015-07-02 |
Family
ID=53481295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/145,739 Abandoned US20150184960A1 (en) | 2013-12-31 | 2013-12-31 | Muzzle Device for Firearm Having a Gas Operating System |
Country Status (2)
Country | Link |
---|---|
US (1) | US20150184960A1 (en) |
WO (1) | WO2015147944A2 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160097609A1 (en) * | 2014-10-03 | 2016-04-07 | Alexander Nikolaevich PENCHUK | Barrel coupling for firearm |
US9513078B1 (en) * | 2016-05-17 | 2016-12-06 | Precision Tooling Products, LLC | Quick mount firearm barrel accessory |
US20170115081A1 (en) * | 2015-10-21 | 2017-04-27 | Maranli Automation, Inc. | Gas apparatus and methods for gas operated firearms |
US20180195826A1 (en) * | 2017-01-11 | 2018-07-12 | Palmetto State Armory, LLC | Modified pistol upper |
US10386140B2 (en) * | 2017-06-12 | 2019-08-20 | Kramer Cartridge & Carbine LLC | Direct gas impingement system |
US10422596B2 (en) * | 2017-06-12 | 2019-09-24 | Kramer Cartridge & Carbine LLC | Bolt carrier group for direct gas impingement system |
US10488130B2 (en) * | 2014-04-07 | 2019-11-26 | Rhino Precision, Llc | Post barrel plenum operated gas cycling system for automatic firearms |
US11022389B2 (en) * | 2018-01-22 | 2021-06-01 | Sig Sauer, Inc. | Gas operating system for an automatic firearm |
US11359879B2 (en) * | 2016-01-20 | 2022-06-14 | Polaris Capital Corporation | Firearm suppressor |
US11614298B2 (en) | 2020-01-21 | 2023-03-28 | Polaris Capital Corporation | Firearm suppressor |
US11740042B2 (en) | 2014-04-07 | 2023-08-29 | Rhino Precision, Llc | Gas tube supports for post barrel plenum operated gas cycling system for automatic firearms |
Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1743472A (en) * | 1924-12-08 | 1930-01-14 | Charles D Meyer | Semiautomatic rifle |
US1901138A (en) * | 1932-02-17 | 1933-03-14 | Gladeon M Barnes | Muzzle brake and gas collector |
US2088268A (en) * | 1933-11-22 | 1937-07-27 | Lauf Hans | Firearm |
US2206568A (en) * | 1938-04-25 | 1940-07-02 | Milton Roberts | Recoil control device |
US2212685A (en) * | 1937-03-22 | 1940-08-27 | Milton Roberts | Control device for control of recoil |
US2398298A (en) * | 1944-03-22 | 1946-04-09 | Remington Arms Co Inc | Firearm |
US3492912A (en) * | 1966-09-01 | 1970-02-03 | Ashbrook Clifford L | Recoil controlling device |
US3710679A (en) * | 1970-12-29 | 1973-01-16 | Quantum Corp | Silencer for mounting on firearm barrel |
US4879942A (en) * | 1984-10-09 | 1989-11-14 | Cave James B | Muzzle brake with improved stabilization and blast control |
US5305678A (en) * | 1992-01-28 | 1994-04-26 | Wesson Firearms Co., Inc. | Compensated barrel shroud |
US5476028A (en) * | 1994-10-28 | 1995-12-19 | Seberger; Oswald P. | Gun muzzle brake |
US5740626A (en) * | 1997-04-03 | 1998-04-21 | Olympic Arms, Inc. | Modified firearms for firing simulated ammunition |
US5831202A (en) * | 1997-03-21 | 1998-11-03 | Rustick; Joseph M. | Muzzle attachment for barrel of gas-operated weapon |
US5937563A (en) * | 1997-04-03 | 1999-08-17 | Schuetz; Robert C. E. | Modified firearms for firing simulated ammunition |
US20100257996A1 (en) * | 2005-09-23 | 2010-10-14 | John Noveske | Flash suppression system |
US7854085B1 (en) * | 2008-02-04 | 2010-12-21 | Highlander Security Consulting, L.L.C. | Gun barrel attachment |
US20120048100A1 (en) * | 2010-08-29 | 2012-03-01 | Robert Bruce Davies | Flash suppressor |
US20120080261A1 (en) * | 2010-08-04 | 2012-04-05 | Ronnie Alexander Shand | Sound and Flash Suppressor for Firearms |
US20120167757A1 (en) * | 2008-07-28 | 2012-07-05 | LWRC International,LLC | Adjustable gas block for an indirect gas operated firearm |
US8250962B1 (en) * | 2010-06-11 | 2012-08-28 | Isaac Guenther | Bullet velocity enhancing rifle attachment assembly |
US8627755B1 (en) * | 2011-09-15 | 2014-01-14 | Don M. Eckel | Muzzle brake |
US20140083286A1 (en) * | 2012-08-23 | 2014-03-27 | Jesus S. Gomez | Adjustable gas block for a gas operated firearm |
US20140190344A1 (en) * | 2013-01-04 | 2014-07-10 | Ra Brands. L.L.C. | Self regulating gas system for suppressed weapons |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05297523A (en) * | 1992-04-17 | 1993-11-12 | Fuji Photo Film Co Ltd | Photographic film cartridge and its production and packing body for photographic film cartridge |
US7856917B2 (en) * | 2008-01-31 | 2010-12-28 | John Noveske | Switchblock |
US8316756B1 (en) * | 2011-05-17 | 2012-11-27 | Phillip Lynn Woodell | Upper receiver gas control for direct impingement firearms |
-
2013
- 2013-12-31 US US14/145,739 patent/US20150184960A1/en not_active Abandoned
-
2014
- 2014-12-31 WO PCT/US2014/072944 patent/WO2015147944A2/en active Application Filing
Patent Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1743472A (en) * | 1924-12-08 | 1930-01-14 | Charles D Meyer | Semiautomatic rifle |
US1901138A (en) * | 1932-02-17 | 1933-03-14 | Gladeon M Barnes | Muzzle brake and gas collector |
US2088268A (en) * | 1933-11-22 | 1937-07-27 | Lauf Hans | Firearm |
US2212685A (en) * | 1937-03-22 | 1940-08-27 | Milton Roberts | Control device for control of recoil |
US2206568A (en) * | 1938-04-25 | 1940-07-02 | Milton Roberts | Recoil control device |
US2398298A (en) * | 1944-03-22 | 1946-04-09 | Remington Arms Co Inc | Firearm |
US3492912A (en) * | 1966-09-01 | 1970-02-03 | Ashbrook Clifford L | Recoil controlling device |
US3710679A (en) * | 1970-12-29 | 1973-01-16 | Quantum Corp | Silencer for mounting on firearm barrel |
US4879942A (en) * | 1984-10-09 | 1989-11-14 | Cave James B | Muzzle brake with improved stabilization and blast control |
US5305678A (en) * | 1992-01-28 | 1994-04-26 | Wesson Firearms Co., Inc. | Compensated barrel shroud |
US5476028A (en) * | 1994-10-28 | 1995-12-19 | Seberger; Oswald P. | Gun muzzle brake |
US5831202A (en) * | 1997-03-21 | 1998-11-03 | Rustick; Joseph M. | Muzzle attachment for barrel of gas-operated weapon |
US5740626A (en) * | 1997-04-03 | 1998-04-21 | Olympic Arms, Inc. | Modified firearms for firing simulated ammunition |
US5937563A (en) * | 1997-04-03 | 1999-08-17 | Schuetz; Robert C. E. | Modified firearms for firing simulated ammunition |
US20100257996A1 (en) * | 2005-09-23 | 2010-10-14 | John Noveske | Flash suppression system |
US7854085B1 (en) * | 2008-02-04 | 2010-12-21 | Highlander Security Consulting, L.L.C. | Gun barrel attachment |
US20120167757A1 (en) * | 2008-07-28 | 2012-07-05 | LWRC International,LLC | Adjustable gas block for an indirect gas operated firearm |
US8250962B1 (en) * | 2010-06-11 | 2012-08-28 | Isaac Guenther | Bullet velocity enhancing rifle attachment assembly |
US20120080261A1 (en) * | 2010-08-04 | 2012-04-05 | Ronnie Alexander Shand | Sound and Flash Suppressor for Firearms |
US20120048100A1 (en) * | 2010-08-29 | 2012-03-01 | Robert Bruce Davies | Flash suppressor |
US8627755B1 (en) * | 2011-09-15 | 2014-01-14 | Don M. Eckel | Muzzle brake |
US20140083286A1 (en) * | 2012-08-23 | 2014-03-27 | Jesus S. Gomez | Adjustable gas block for a gas operated firearm |
US20140190344A1 (en) * | 2013-01-04 | 2014-07-10 | Ra Brands. L.L.C. | Self regulating gas system for suppressed weapons |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10488130B2 (en) * | 2014-04-07 | 2019-11-26 | Rhino Precision, Llc | Post barrel plenum operated gas cycling system for automatic firearms |
US11740042B2 (en) | 2014-04-07 | 2023-08-29 | Rhino Precision, Llc | Gas tube supports for post barrel plenum operated gas cycling system for automatic firearms |
US9927201B2 (en) * | 2014-10-03 | 2018-03-27 | Alexander Nikolaevich PENCHUK | Barrel coupling for firearm |
US20160097609A1 (en) * | 2014-10-03 | 2016-04-07 | Alexander Nikolaevich PENCHUK | Barrel coupling for firearm |
US20170115081A1 (en) * | 2015-10-21 | 2017-04-27 | Maranli Automation, Inc. | Gas apparatus and methods for gas operated firearms |
US10036603B2 (en) * | 2015-10-21 | 2018-07-31 | Maranli Automation, Inc. | Gas apparatus and methods for gas operated firearms |
US20220316835A1 (en) * | 2016-01-20 | 2022-10-06 | Polaris Capital Corporation | Firearm suppressor |
US11359879B2 (en) * | 2016-01-20 | 2022-06-14 | Polaris Capital Corporation | Firearm suppressor |
US11549773B2 (en) * | 2016-01-20 | 2023-01-10 | Polaris Capital Corporation | Firearm suppressor |
US9513078B1 (en) * | 2016-05-17 | 2016-12-06 | Precision Tooling Products, LLC | Quick mount firearm barrel accessory |
US10619964B2 (en) * | 2017-01-11 | 2020-04-14 | Palmetto State Armory, LLC | Modified pistol upper |
US20180195826A1 (en) * | 2017-01-11 | 2018-07-12 | Palmetto State Armory, LLC | Modified pistol upper |
US10422596B2 (en) * | 2017-06-12 | 2019-09-24 | Kramer Cartridge & Carbine LLC | Bolt carrier group for direct gas impingement system |
US10386140B2 (en) * | 2017-06-12 | 2019-08-20 | Kramer Cartridge & Carbine LLC | Direct gas impingement system |
US11022389B2 (en) * | 2018-01-22 | 2021-06-01 | Sig Sauer, Inc. | Gas operating system for an automatic firearm |
US11614298B2 (en) | 2020-01-21 | 2023-03-28 | Polaris Capital Corporation | Firearm suppressor |
Also Published As
Publication number | Publication date |
---|---|
WO2015147944A2 (en) | 2015-10-01 |
WO2015147944A3 (en) | 2015-11-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20150184960A1 (en) | Muzzle Device for Firearm Having a Gas Operating System | |
US10048029B2 (en) | Firearm having gas piston system | |
US9016188B2 (en) | Firearm having gas piston system | |
US5351598A (en) | Gas-operated rifle system | |
US5448940A (en) | Gas-operated M16 pistol | |
US9513074B1 (en) | Firearm with interchangeable parts | |
US7836809B2 (en) | Flash suppression system | |
US8893608B2 (en) | Gas piston system for M16/AR15 rifle or M4 carbine systems | |
US11098972B2 (en) | Recoil system for a self-loading firearm | |
US8967033B1 (en) | Concentric cylinder gas-operated automatic firearm | |
US20170241729A1 (en) | Bolt Catch for a Rifle | |
US9372041B1 (en) | Armorer tool | |
US20160245600A1 (en) | Systems and methods for providing a multi-shot firearm | |
US20200025477A1 (en) | Adjustable gas block assembly for a gas operated semi-automatic firearm | |
US8468731B2 (en) | Muzzleloading rifle with breech plug having primer seal facility | |
US8931194B2 (en) | Muzzle-loading firearm with a removable, threadless breech plug | |
US20090151214A1 (en) | Gun cleaning tool kit | |
US11592248B2 (en) | Hybrid gas-piston rifle and barrel nut | |
US6865838B2 (en) | Multiple auto primer system for muzzle-loading firearm | |
US20160265859A1 (en) | Blowback-type firing unit | |
US6318231B1 (en) | Semi-automatic pistol barrel with precision barrel muzzle bushings and method | |
RU2694383C1 (en) | Under-barrel grenade launcher to small arms | |
EP3704435B1 (en) | A new mechanism structure for firearms | |
RU2307995C1 (en) | Small arms cartridge | |
RU152000U1 (en) | AUTOMATIC SNIPER RELEASE ARMS “SELECTION” MECHANISM (OPTIONS) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TROY INDUSTRIES, INC., MASSACHUSETTS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MONVELDT, SERGEY;REEL/FRAME:032417/0066 Effective date: 20140106 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |