US3330183A - Gas and manual operation assembly for semi-automatic firearms - Google Patents

Gas and manual operation assembly for semi-automatic firearms Download PDF

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Publication number
US3330183A
US3330183A US505264A US50526465A US3330183A US 3330183 A US3330183 A US 3330183A US 505264 A US505264 A US 505264A US 50526465 A US50526465 A US 50526465A US 3330183 A US3330183 A US 3330183A
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Prior art keywords
gas
barrel
gas cylinder
casing
semi
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Expired - Lifetime
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US505264A
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Loffler Theodor
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Rheinmetall Industrie AG
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Rheinmetall GmbH
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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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/72—Operating handles or levers; Mounting thereof in breech-blocks or bolts
    • 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
    • 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
    • F41A5/28—Adjustable systems

Definitions

  • a gas and manual actuation assembly including a gas cylinder communicating with the barrel, means transmitting operating force to the breech mechanism and including a reduced diameter gas piston portion entering into the gas cylinder to be acted upon by propellant gases, and manual actuation means including a sleeve member encircling the gas cylinder and gas piston and manually operable to engage the force transmitting means.
  • This invention relates to automatic firearms, such as a gas-operated rifle, which have a rigidly or semi-rigidly locked breech mechanism and, more particularly, to such firearms having a pneumatically operated breech mechanism buffer, the cylinder of which is a component part of the breech mechanism or is connected or coupled to a part of that mechanism during movement, such as for example, the bolt carrier.
  • This rifle is an automatic rifle having a semi-rigid bolt locked by rollers and is identified in Germany as Pattern G 3.
  • the arrangement of the cocking slide of the breech mechanism is to remain unchanged as far as possible, so as not to render necessary undesirable additional apertures in the wall of the weapon casing which have a detrimental eflect on the stability of the latter, as in the case in certain known machine pistols.
  • the buffer cylinder has, at its forward end (toward the muzzle), a preferably tubular extension functioning as the gas piston.
  • the gas piston is more fully integrated into the general construction of the weapon.
  • a gas cylinder of special construction is associated with the gas piston, namely one which itself comprises a head piece with a longitudinal bore in which the terminal portion of a gas feed tube is elfectively secured in gas-tight fashion simply by pushing it in.
  • the gas cylinder in order to enable the cocking slide for the breech mechanism to be arranged in the customary manner in the gas-operated rifle, is so designed that there is suflicient space available in its middle section for accommodating the sleeve of the cocking slide.
  • FIGURE 1 is an elevation view, partly in section, of a forward end portion of an assault rifle constructed in accordance with this invention
  • FIGURE 2 is a section along the line A, B, C, D in FIGURE 1;
  • FIGURE 3 is 'a view from below, partly in section of the parts adjacent the cocking slide of the breech mechanism and its guide sleeve, as seen substantially in the direction of the arrow E in FIGURE 1.
  • a forward portion of an assault rifle which has a casing 1, to which the barrell 2 of the weapon is fixed.
  • a front sight assembly indicated generally at 3, which contains a gas duct 4, with deflection of a stream of gas tapped off from the barrel being effected by an intermediate piece 5.
  • the deflection is produced by a substantially arcuate milled recess 16 in the intermediate piece 5.
  • the latter is fixed to the front sight assembly 3 of a pin 7.
  • a sleeve-shaped body 8 Arranged concentrically with the intermediate piece 5 is a sleeve-shaped body 8, having a flange 9 which is provided with four locking bores 10 for cooperation with a spring-loaded pin 11 guided slidably in the body of the front sight assembly.
  • the body 8 has a plurality of nozzle-like bores 13, 14, 15 which are of different transverse cross-sectional areas to enable the quantity of gas to be supplied to the gas cylinder, which is still to be described, to be adjusted.
  • This adjustment is effected in known manner by turning the body 8 after the pin 11 has first been forced clear of the flanges 9 against the action of the spring 11'. This can be done, for instance, with the bullet tip of a cartridge, which is pressed against a center punch hole 16 in the pin 11.
  • a cylindrical head piece 17 of a gas feed tube 18 which has an insertion end 19 in the form of a cone of small cone angle.
  • the head piece 17 is so mounted in the sleeve part 8 that it is capable of axial movement. Consequently, by simply pushing, the insertion end can be connected in efiective gas-tight fashion with the head piece of a gas cylinder 20, which is itself fixed, as for example by welding at 21 and 22, to the casing 1 of the Weapon and to a tube 23 mounted on the casing of the weapon.
  • a gas piston 24 is slidably mounted in the gas cylinder 20, the gas piston forming an extension of a buffer cylinder 25.
  • the buffer cylinder is arranged to serve, in conjunction with a damping piston (not shown) arranged at the front end of the breech mechanism carrier, to resiliently absorb surplus impact energy transmitted to the breech mechanism carrier on firing.
  • a damping piston (not shown) arranged at the front end of the breech mechanism carrier, to resiliently absorb surplus impact energy transmitted to the breech mechanism carrier on firing.
  • the gas cylinder 20 is so designed (see in particular FIG- URE 1) that there is suflicient space, available in its middle portion for accommodating the sleeve 26 of a cocking slide 27 having a pivot bearing 28 and a locking device 29 for the two locations of the cocking slide.
  • a gas and manual actuation assembly for effecting movement longitudinally of the barrel comprising a gas cylinder within the casing, gas conduit means operatively connecting said gas cylinder and the barrel for admitting projectile propellant gas into said gas cylinder upon firing of the firearm, force transmitting means within the casing and guided thereby for movement longitudinally of the barrel and being operatively connected to the breech mechanism for transmitting force thereto, said force transmitting means including a reduced diameter gas piston portion at the forward extremity thereof and entering into said gas cylinder for reciprocation therewithin, and manual actuation means including a sleeve member within said casing and encircling said gas cylinder and said gas piston, said sleeve member operatively engaging said force transmitting means at a location spaced from said extremity thereof and being adapted for manual reciprocation within the 20 casing to actuate said force transmitting means as required.
  • a firearm as claimed in claim 1 wherein said gas conduit means connecting said gas cylinder and barrel comprising a gas tube received within a tubular bore at one end of said gas cylinder.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Description

July 11, 1967 T. LOFFLER 3,330,183
GAS AND MANUAL OPERATION ASSEMBLY FOR SEMI-AUTOMATIC FIREARMS Filed Oct. 26, 1965 WT c H $4 K 1 [TA Fig.3
United States Patent 3,330,183 GAS AND MANUAL OPERATION ASSEMBLY FOR SEMI-AUTOMATIC FIREARMS Theodor Liifller, Mullheim, Baden, Germany, assignor to Rheiumetall G.m.b.H., Dusseldorf, Germany, a German company Filed Oct. 26, 1965, Ser. No. 505,264 Claims priority, application Germany, Oct. 29, 1964, R 39,132 3 Claims. (Cl. 89-191) ABSTRACT OF THE DISCLOSURE In a semi-automatic firearm, a gas and manual actuation assembly including a gas cylinder communicating with the barrel, means transmitting operating force to the breech mechanism and including a reduced diameter gas piston portion entering into the gas cylinder to be acted upon by propellant gases, and manual actuation means including a sleeve member encircling the gas cylinder and gas piston and manually operable to engage the force transmitting means.
This invention relates to automatic firearms, such as a gas-operated rifle, which have a rigidly or semi-rigidly locked breech mechanism and, more particularly, to such firearms having a pneumatically operated breech mechanism buffer, the cylinder of which is a component part of the breech mechanism or is connected or coupled to a part of that mechanism during movement, such as for example, the bolt carrier.
It is an object of this invention to provide an improved gas-operated weapon based on an assault rifle presently in use by the armies of Germany and other member nations of NATO, Without abandoning the successful basic conception of that rifle, and with a minimum of changes in the construction thereof. This rifle is an automatic rifle having a semi-rigid bolt locked by rollers and is identified in Germany as Pattern G 3. In particular, the arrangement of the cocking slide of the breech mechanism is to remain unchanged as far as possible, so as not to render necessary undesirable additional apertures in the wall of the weapon casing which have a detrimental eflect on the stability of the latter, as in the case in certain known machine pistols.
According to this invention, in weapons of the abovementioned kind, the buffer cylinder has, at its forward end (toward the muzzle), a preferably tubular extension functioning as the gas piston. As a result, the gas piston is more fully integrated into the general construction of the weapon.
Advantageously, a gas cylinder of special construction is associated with the gas piston, namely one which itself comprises a head piece with a longitudinal bore in which the terminal portion of a gas feed tube is elfectively secured in gas-tight fashion simply by pushing it in.
By provision of this means, a gas operation system which is of simple construction and assembly and, moreover, inexpensive to produce is obtained. In particular, simplicity and cheapness arise because the insertion end of the gas feed tube is in the form of a cone having a cone angle of less than 20.
According to another subsidiary feature of the invention, in order to enable the cocking slide for the breech mechanism to be arranged in the customary manner in the gas-operated rifle, the gas cylinder is so designed that there is suflicient space available in its middle section for accommodating the sleeve of the cocking slide.
Some of the objects and advantages of the invention 3,3305183 Patentedv July 11, 1967 having been stated, others will appear as the description proceeds when taken in connection with the accompanying drawings, in which- FIGURE 1 is an elevation view, partly in section, of a forward end portion of an assault rifle constructed in accordance with this invention;
FIGURE 2 is a section along the line A, B, C, D in FIGURE 1; and
FIGURE 3 is 'a view from below, partly in section of the parts adjacent the cocking slide of the breech mechanism and its guide sleeve, as seen substantially in the direction of the arrow E in FIGURE 1.
Referring now more particularly to the drawing, a forward portion of an assault rifle is shown which has a casing 1, to which the barrell 2 of the weapon is fixed. On the barrel 2 is mounted a front sight assembly indicated generally at 3, which contains a gas duct 4, with deflection of a stream of gas tapped off from the barrel being effected by an intermediate piece 5. The deflection is produced by a substantially arcuate milled recess 16 in the intermediate piece 5. The latter is fixed to the front sight assembly 3 of a pin 7. Arranged concentrically with the intermediate piece 5 is a sleeve-shaped body 8, having a flange 9 which is provided with four locking bores 10 for cooperation with a spring-loaded pin 11 guided slidably in the body of the front sight assembly. In the place of a tapping hole 12 in the weapon barrel 2, the body 8 has a plurality of nozzle- like bores 13, 14, 15 which are of different transverse cross-sectional areas to enable the quantity of gas to be supplied to the gas cylinder, which is still to be described, to be adjusted. This adjustment is effected in known manner by turning the body 8 after the pin 11 has first been forced clear of the flanges 9 against the action of the spring 11'. This can be done, for instance, with the bullet tip of a cartridge, which is pressed against a center punch hole 16 in the pin 11.
Mounted in the sleeve-shaped body 8 is a cylindrical head piece 17 of a gas feed tube 18 which has an insertion end 19 in the form of a cone of small cone angle. The head piece 17 is so mounted in the sleeve part 8 that it is capable of axial movement. Consequently, by simply pushing, the insertion end can be connected in efiective gas-tight fashion with the head piece of a gas cylinder 20, which is itself fixed, as for example by welding at 21 and 22, to the casing 1 of the Weapon and to a tube 23 mounted on the casing of the weapon. A gas piston 24 is slidably mounted in the gas cylinder 20, the gas piston forming an extension of a buffer cylinder 25. The buffer cylinder is arranged to serve, in conjunction with a damping piston (not shown) arranged at the front end of the breech mechanism carrier, to resiliently absorb surplus impact energy transmitted to the breech mechanism carrier on firing. As will readily be seen, as a result of the step of fitting the gas piston at the front end of the buffer cylinder, a particularly neat solution is obtained from the point of view of design for conversion of the existing firearm of the type described into a gasoperated rifle. At the same time, it is also important that the gas cylinder 20 is so designed (see in particular FIG- URE 1) that there is suflicient space, available in its middle portion for accommodating the sleeve 26 of a cocking slide 27 having a pivot bearing 28 and a locking device 29 for the two locations of the cocking slide.
In the drawings and specification there has been set forth a preferred embodiment of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.
What is claimed is:
1. In a semi-automatic firearm having a barrel, a casing and a breech mechanism, a gas and manual actuation assembly for effecting movement longitudinally of the barrel comprising a gas cylinder within the casing, gas conduit means operatively connecting said gas cylinder and the barrel for admitting projectile propellant gas into said gas cylinder upon firing of the firearm, force transmitting means within the casing and guided thereby for movement longitudinally of the barrel and being operatively connected to the breech mechanism for transmitting force thereto, said force transmitting means including a reduced diameter gas piston portion at the forward extremity thereof and entering into said gas cylinder for reciprocation therewithin, and manual actuation means including a sleeve member within said casing and encircling said gas cylinder and said gas piston, said sleeve member operatively engaging said force transmitting means at a location spaced from said extremity thereof and being adapted for manual reciprocation within the 20 casing to actuate said force transmitting means as required.
2. A firearm as claimed in claim 1 wherein said gas conduit means connecting said gas cylinder and barrel comprising a gas tube received within a tubular bore at one end of said gas cylinder.
3. A firearm as claimed in claim 2 wherein said tube and tubular bore are conically tapered.
References Cited UNITED STATES PATENTS 1,572,450 2/ 1926 Swebilius 89198 X 2,186,582 1/1940 Gebauer 89-193 2,462,119 2/1949 Moore 89-193 2,865,256 12/1958 Marsh 89-191 3,225,657 12/1965 Kruzell 89191 FOREIGN PATENTS 115,901 2/1946 Sweden.
BENJAMIN A. BORCHELT, Primary Examiner S. C. BENTLEY, Assistant Examiner.

Claims (1)

1. IN A SEMI- AUTOMATIC FIREARM HAVING A BARREL, A CASING AND A BREECH MECHANISM, A GAS AND MANUAL ACTUATION ASSEMBLY FOR EFFECTING MOVEMENT LONGITUDINALLY OF THE BARREL COMPRISING A GAS CYLINDER WITHIN THE CASING, GAS CONDUIT MEANS OPERATIVELY CONNECTING SAID GAS CYLINDER AND THE BARREL FOR ADMITTING PROJECTILE PROPELLANT GAS INTO SAID GAS CYLINDER UPON FIRING OF THE FIREARM, FORCE TRANSMITTING MEANS WITHIN THE CASING AND GUIDED THEREBY FOR MOVEMENT LONGITUDINALLY OF THE BARREL AND BEING OPERATIVELY CONNECTED TO THE BREECH MECHANISM FOR TRANSMITTING FORCE THERETO, SAID FORCE TRANSMITTING MEANS INCLUDING A REDUCED DIAMETER GAS PISTON PORTION AT THE FORWARD EXTREMITY THEREOF AND ENTERING INTO SAID GAS CYLINDER FOR RECIPROCATION THEREWITHIN, AND MANUAL ACTUATION MEANS
US505264A 1964-10-29 1965-10-26 Gas and manual operation assembly for semi-automatic firearms Expired - Lifetime US3330183A (en)

Applications Claiming Priority (1)

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DER39132A DE1290454B (en) 1964-10-29 1964-10-29 Gas pressure charger

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BE (1) BE671496A (en)
CH (1) CH439022A (en)
DE (1) DE1290454B (en)
ES (1) ES319083A1 (en)
GB (1) GB1063531A (en)
NL (1) NL6514091A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5945626A (en) * 1997-09-09 1999-08-31 Colt's Manufacturing Company Inc. Gas operated firearm with clamp on gas block
US20050056818A1 (en) * 2003-09-17 2005-03-17 Harrah Eric A. Wheel lift attachment and method
US20090007478A1 (en) * 2005-09-13 2009-01-08 Norbert Fluhr Gas cylinder components for use with firearms
US20100186582A1 (en) * 2009-01-26 2010-07-29 Magpul Industries Corp. Gas System for an Automatic Firearm
US20100199836A1 (en) * 2006-01-30 2010-08-12 Herring Geoffrey A Gas piston assembly and bolt carrier for gas-operated firearms
US20100282066A1 (en) * 2007-10-22 2010-11-11 Jerome Benedict Tankersley Gas block and installation device
US20100319528A1 (en) * 2009-06-22 2010-12-23 Kenney Daniel E Gas plug retention and removal device
US20110179945A1 (en) * 2010-01-26 2011-07-28 Robert Bernard Iredale Clark Gas Operating Systems, Subsystems, Components and Processes
US8176837B1 (en) * 2009-10-11 2012-05-15 Jason Stewart Jackson Firearm operating rod
WO2012097334A3 (en) * 2011-01-14 2013-08-15 ArmWest, LLC Firearm
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US8640598B1 (en) 2010-07-19 2014-02-04 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US8813406B1 (en) 2010-03-25 2014-08-26 ArmWest, LLC High capacity magazine with multiple springs
US8973483B2 (en) 2010-03-25 2015-03-10 Arm West, Llc Gas regulator system
US9038525B2 (en) 2011-01-14 2015-05-26 ArmWest, LLC Firearm
US9261314B1 (en) 2010-07-19 2016-02-16 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US9488423B2 (en) 2011-01-14 2016-11-08 Arm West, Llc Firearm systems and methods
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
US10401102B1 (en) 2015-07-31 2019-09-03 Aaron J. Carroll Firearm conversion device
US10488136B2 (en) 2016-09-23 2019-11-26 ArmWest, LLC Selective fire firearm systems and methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1572450A (en) * 1919-05-15 1926-02-09 Marlin Firearms Corp Automatic rifle
US2186582A (en) * 1937-04-28 1940-01-09 Danuvia Ipari Es Kereskedelmi Gas-operated firearm
US2462119A (en) * 1946-06-28 1949-02-22 Cyril A Moore Gas regulating device for firearms
US2865256A (en) * 1954-10-13 1958-12-23 Weapons Inc Compensating device for firearms
US3225657A (en) * 1964-07-15 1965-12-28 George R Kruzell Closed breech gun

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH244867A (en) * 1943-08-09 1946-10-15 Zbrojovka Brno As Gas pressure charger.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1572450A (en) * 1919-05-15 1926-02-09 Marlin Firearms Corp Automatic rifle
US2186582A (en) * 1937-04-28 1940-01-09 Danuvia Ipari Es Kereskedelmi Gas-operated firearm
US2462119A (en) * 1946-06-28 1949-02-22 Cyril A Moore Gas regulating device for firearms
US2865256A (en) * 1954-10-13 1958-12-23 Weapons Inc Compensating device for firearms
US3225657A (en) * 1964-07-15 1965-12-28 George R Kruzell Closed breech gun

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5945626A (en) * 1997-09-09 1999-08-31 Colt's Manufacturing Company Inc. Gas operated firearm with clamp on gas block
US20050056818A1 (en) * 2003-09-17 2005-03-17 Harrah Eric A. Wheel lift attachment and method
US20090007478A1 (en) * 2005-09-13 2009-01-08 Norbert Fluhr Gas cylinder components for use with firearms
US7637199B2 (en) * 2005-09-13 2009-12-29 Heckler & Koch Gmbh Gas cylinder components for use with firearms
US20100199836A1 (en) * 2006-01-30 2010-08-12 Herring Geoffrey A Gas piston assembly and bolt carrier for gas-operated firearms
US8109193B2 (en) * 2006-01-30 2012-02-07 Herring Geoffrey A Gas piston assembly and bolt carrier for gas-operated firearms
US7921760B2 (en) 2007-10-22 2011-04-12 Jerome Benedict Tankersley Compact gas block with rail interface
US20100282066A1 (en) * 2007-10-22 2010-11-11 Jerome Benedict Tankersley Gas block and installation device
US20100186582A1 (en) * 2009-01-26 2010-07-29 Magpul Industries Corp. Gas System for an Automatic Firearm
US8201489B2 (en) * 2009-01-26 2012-06-19 Magpul Industries Corp. Gas system for an automatic firearm
US8061260B2 (en) * 2009-06-22 2011-11-22 Ra Brands, L.L.C. Gas plug retention and removal device
US20100319528A1 (en) * 2009-06-22 2010-12-23 Kenney Daniel E Gas plug retention and removal device
US8176837B1 (en) * 2009-10-11 2012-05-15 Jason Stewart Jackson Firearm operating rod
US20110179945A1 (en) * 2010-01-26 2011-07-28 Robert Bernard Iredale Clark Gas Operating Systems, Subsystems, Components and Processes
US8443711B2 (en) 2010-01-26 2013-05-21 Leitner-Wise Defense, Inc. Gas operating systems, subsystems, components and processes
US8997622B2 (en) 2010-01-26 2015-04-07 Leitner-Wise Defense, Inc. Gas operating systems, subsystems, components and processes
US8813406B1 (en) 2010-03-25 2014-08-26 ArmWest, LLC High capacity magazine with multiple springs
US8973483B2 (en) 2010-03-25 2015-03-10 Arm West, Llc Gas regulator system
US9261314B1 (en) 2010-07-19 2016-02-16 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US8640598B1 (en) 2010-07-19 2014-02-04 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US9488423B2 (en) 2011-01-14 2016-11-08 Arm West, Llc Firearm systems and methods
US10415906B2 (en) 2011-01-14 2019-09-17 ArmWest, LLC Firearm systems and methods
US9228786B2 (en) 2011-01-14 2016-01-05 ArmWest, LLC Quick barrel change firearm
US11137222B2 (en) 2011-01-14 2021-10-05 ArmWest, LLC Firearm systems and methods
WO2012097334A3 (en) * 2011-01-14 2013-08-15 ArmWest, LLC Firearm
US9038525B2 (en) 2011-01-14 2015-05-26 ArmWest, LLC Firearm
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
US10401102B1 (en) 2015-07-31 2019-09-03 Aaron J. Carroll Firearm conversion device
US11073349B2 (en) 2015-07-31 2021-07-27 Aaron J. Carroll Firearm conversion device
US11566858B2 (en) 2015-07-31 2023-01-31 Aaron J. Carroll Firearm conversion device
US12072160B2 (en) 2015-07-31 2024-08-27 Aaron J. Carroll Bladed firearm bolt stop
US10488136B2 (en) 2016-09-23 2019-11-26 ArmWest, LLC Selective fire firearm systems and methods
US11650023B2 (en) 2016-09-23 2023-05-16 Arm West, Llc Selective fire firearm systems and methods

Also Published As

Publication number Publication date
CH439022A (en) 1967-06-30
DE1290454B (en) 1969-03-06
NL6514091A (en) 1966-05-02
GB1063531A (en) 1967-03-30
ES319083A1 (en) 1966-04-16
BE671496A (en) 1966-02-14

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