US2426563A - Recoil mechanism for automatic firearms - Google Patents

Recoil mechanism for automatic firearms Download PDF

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Publication number
US2426563A
US2426563A US557293A US55729344A US2426563A US 2426563 A US2426563 A US 2426563A US 557293 A US557293 A US 557293A US 55729344 A US55729344 A US 55729344A US 2426563 A US2426563 A US 2426563A
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bolt
sleeve
spring
shoulder
recoil
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Expired - Lifetime
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US557293A
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Patchett George William
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    • 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
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/03—Shot-velocity control
    • 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
    • F41A3/78—Bolt buffer or recuperator means

Definitions

  • the bolt is caused to move rearward from the prior firing position by gas pressure of the explosive charge, this pressure and the energy imparted to the bolt being absorbed by a recoil spring.
  • the invention enables a bolt of standard weight and a spring of standard strength to be retained and wherein there is provided within the casing of the gun and at the rear of the bolt a braking device, which latter tends to absorb the surplus energy of the bolt movement with strong ammunition, the said brake device being of a character progressively to retard movement but in a manner that admits, when the passage of the bolt is finally stopped, of the recoil spring reacting to urge the bolt forward.
  • the invention consists in an automatic firearm of the type set forth wherein a resilient frictional braking device is adapted to operate in combination with the normal recoil spring to arrest bolt movement.
  • Said braking device con- 1 Claim. (o1. 89198) sists of a continuous or discontinuous member concentric with or aligned to the said bolt, said braking device having outwardly flared tapering spring leaves.
  • the bolt is formed with a rear portion to engage the said braking device, or is provided or fitted with a spring controlled sleeve having limited movement for a like purpose.
  • the said braking device is characterised that its action to resist bolt motion becomes progressively greater as and when rearward motion continues, and is operative over equispaced parts of the peripheral contour of said bolt, and is preferably caused to be inoperative at or about cocking position of the said bolt.
  • the frictional braking device preferably consists of a cylindrical sleeve which is split axially having an internal diameter slightly smaller than the outer diameter of a cylindrical sleeve mounted upon the bolt or a cylindrical portion of the bolt if the latter is modified.
  • the split sleeve can be mounted in a position so that a cylindrical part of the bolt only engages the split sleeve when the travel becomes greater than the normal setting, the engagement of the parts causing friction to be set up, which aids the main spring to bring the mass of the bolt to rest.
  • the spring at this point, being under maximum compression, then forces the bolt forward, therefore disengaging the cylindrical part of the bolt from the split sleeve, and the bolt is thereafter free to move forward in the usual manner.
  • Fig. 1 is a longitudinal sectional elevation of an automatic firearm, showing the bolt in the cooked position
  • Fig. 2 is a cross section taken on the line 22 in Fig. 1 showing the form of braking device
  • Fig. 2a is a View similar to Fig. 2, showing a modified form of thebraking device.
  • Fig, 3 shows the bolt at the end of its forward movement at the time of firing.
  • Fig. 3a is a longitudinal section of the rear end of the bolt casing, showing another form of braking device.
  • Fig. 4 shows in part section a modified form of the bolt.
  • the bolt and its components A reciprocate within the casing B, and in its rearward motion compresses the recoil spring C which latter has an abutment on a flange 9 of the firing pin body 2 and on the end cap D.
  • the bolt A in the form shown has three principal parts, the forward or slipper portion l engaging the interior of the cylindrical casing B, an inner concentric firing pin body 2, and an intermediate sleeve 3. These three parts are each capable of relative axial movement or of combined movement.
  • Said sleeve 3 has rear and forward parts of differing diameters providing a shoulder 4, said shoulder adapted to engage the terminal rim of bolt part I and enable sleeve 3 to have its fore part 3a internal of bolt part I whilst its rear part 3b is in external alignment with the rear outer extremity of the shoulder 5.
  • the sleeve part 3a is flanged at B and carries the forward end of spring 'i which abuts rearward upon shoulder 8 of the firing pin body 2
  • the firing pin body 2 has a flange 9 which constitutes one abutment for the recoil spring C, the other aboutment being the recess H] in the end cap D.
  • the braking device consists of a continuous or discontinuous ring 12, see Fig.
  • the ring i2 is mounted externally of the recoil spring C and is formed with a series of axially cut leaves I4, each of a section tapering as at l5 forward, the said forward extremities being flared outwardly as at H5.
  • the bolt is positioned in Fig. 1 in the cooked position, the sear E engaging the shoulder F formed upon the foreface of the boltA.
  • the sear in the known manner is under control of the trigger G in conjunction with a fire selection device H.
  • Part 2 situated within bolt A carries the firing pin J.
  • the bolt A is shown in its firing position, the fore part engaging the breech of barrel K.
  • the recoil spring C is fully extended, and the firing pin J in its operative position, the base of the inner firing pin body 2 contacting the rear wall of the bolt socket with the spring '5 extended.
  • the bolt A as a'whole then starts to move carrying the sleeve 3 compressing the recoil spring C, until the sleeve part 31) enters the flared throat H5 of the spring leaves M of the brake ring 42.
  • the said spring leaves press upon the sleeve 3 and exert therefore a continuously increasing frictional resistance to the passage rearward of the bolt as a whole, in addition to the increasing resistance of the recoil spring 0.
  • the firing pin body abuts upon the rear face of the bolt A and the sleeve 3 may have relative motion but drag behind by reason of the frictional grip of the brake [2 upon its rear periphery. Should this happen the flange abutment 9 engages the shoulder 4 of the sleeve 3 with momentum and causes the sleeve to disengage and move into the position shown in Fig. 1, the spring I assisting this operation.
  • the brake ring l2 may be either a continuous or discontinuous ring, the discontinuous form shown in Fig. 2a, however, enabling the brake fitting to be applied to a variety of weapons ofthe same class, having small divergencies of diameter of the bolt race casing B.
  • the firing pin is a solid entity on the face of the bolt
  • the firing pin body 2 and independent sleeve 3 are dispensed with, and the rear of the bolt formed to engage the braking device, see Fig. 4.
  • the sleeve 3 may be provided with an inclined slot 20 into which the pin 2
  • the interengagement of the said pin 2! with the walls of the slot 20 causes slight rotation of the sleeve 3.
  • This feature is of importance should grit or other adventitious matter be lodged in the split sleeve and tend to create a binding action between the engaged parts. The effect of this turning movement is to assist disengagement and transfer any grit allowing it to escape through the nearest interstice between the component leaves of the brake ring.
  • the 'rateoffire is brought under control despite variation in the explosive energy of the ammunition used and continuous firing with weak ammunition eliminated.
  • the shoulder F on bolt A may, if required, be placed further rearward, the sear E travelling in a groove out in the bolt (-not shown) until the shoulder is reached.
  • a reciprocatory breech bolt a recoil spring therefor, a friction brake in telescopic relation with the bolt and engageable frictionally therewith during the recoil thereof, and means for imparting relative rotation between saidbolt and'friction brake during reciprocation of said bolt.

Description

RECOIL MECHANISM FOR AUTOMATIC FIREARMS Filed Oct. 5, 1944 2 Sheets-Sheet 1 62-01%: lV/LLIHM Para/457T Aug. 26, 1%?
G. w. PATCHETT 2,4265%3 G'EORGEML Z MM PA TC HET T fll 'owaays,
Patented Aug. 26, 1947 RECOIL MECHANISM FOR AUTOMATIC FIREARMS George William Patchett, Chigwell, England Application October 5, 1944, Serial No. 557,293 In Great Britain April 1, 1943 This invention relates to improvements in automatic firearms and has for its object the control of the recoiling bolt mass on the rearward and forward runs.
In automatic weapons to which the subject matter of this invention relates the operation of firing is dependent upon the movement of the bolt within its casing, said bolt having a shoulder formed in its length and in line with a trigger actuated sear, the latter engaging the shoulder for non-automatic operation, the sear, under a selection device of known type being held inoperative, and out of engagement with the shoulder when the weapon is desired to be automatic.
The bolt is caused to move rearward from the prior firing position by gas pressure of the explosive charge, this pressure and the energy imparted to the bolt being absorbed by a recoil spring.
In testing ammunition produced in various countries and of differing age there is a very marked difierence in the amount of recoil of the bolt and therefore the distance of the shoulder of the bolt beyond the sear face. With a standard weapon of the type above described this difference may vary in the movement of the bolt from a mean high travel of 1.87% inches to a low mean of 0.593 inch. Again on the same test there was a difference of 1.812 inches between the travel imparted by a poor ammunition and a good ammunition when used in the same gun. This difierence of possible travel of the bolt has many disadvantages. With a short travel there is a risk that the shoulder is not engaged by the sear and that the automatic fire set up cannot be made to cease until a stronger charge is fired or the magazine empty, If the travel is the maximum run of the bolt and of a high order the life of the weapon may be impaired.
To avoid straining the firearm it is not permissible to fit a weaker main spring to compensate for the eiTect of weaker ammunition, and it is essential that the spring remains a standard to avoid separation of the arm into distinct classes for different makes of cartridges.
The invention enables a bolt of standard weight and a spring of standard strength to be retained and wherein there is provided within the casing of the gun and at the rear of the bolt a braking device, which latter tends to absorb the surplus energy of the bolt movement with strong ammunition, the said brake device being of a character progressively to retard movement but in a manner that admits, when the passage of the bolt is finally stopped, of the recoil spring reacting to urge the bolt forward.
The invention consists in an automatic firearm of the type set forth wherein a resilient frictional braking device is adapted to operate in combination with the normal recoil spring to arrest bolt movement. Said braking device con- 1 Claim. (o1. 89198) sists of a continuous or discontinuous member concentric with or aligned to the said bolt, said braking device having outwardly flared tapering spring leaves. The bolt is formed with a rear portion to engage the said braking device, or is provided or fitted with a spring controlled sleeve having limited movement for a like purpose. The said braking device is characterised that its action to resist bolt motion becomes progressively greater as and when rearward motion continues, and is operative over equispaced parts of the peripheral contour of said bolt, and is preferably caused to be inoperative at or about cocking position of the said bolt.
Although the mechanical embodiment of the above invention may take more than one form, the frictional braking device preferably consists of a cylindrical sleeve which is split axially having an internal diameter slightly smaller than the outer diameter of a cylindrical sleeve mounted upon the bolt or a cylindrical portion of the bolt if the latter is modified. The split sleeve can be mounted in a position so that a cylindrical part of the bolt only engages the split sleeve when the travel becomes greater than the normal setting, the engagement of the parts causing friction to be set up, which aids the main spring to bring the mass of the bolt to rest. The spring at this point, being under maximum compression, then forces the bolt forward, therefore disengaging the cylindrical part of the bolt from the split sleeve, and the bolt is thereafter free to move forward in the usual manner.
In order that the invention may be more fully understood reference is made to the accompanying drawings wherein a preferred embodiment of the invention is shown, and wherein:
Fig. 1 is a longitudinal sectional elevation of an automatic firearm, showing the bolt in the cooked position,
Fig. 2 is a cross section taken on the line 22 in Fig. 1 showing the form of braking device,
Fig. 2a is a View similar to Fig. 2, showing a modified form of thebraking device.
Fig, 3 shows the bolt at the end of its forward movement at the time of firing.
Fig. 3a is a longitudinal section of the rear end of the bolt casing, showing another form of braking device.
Fig. 4 shows in part section a modified form of the bolt.
Referring to the drawings the bolt and its components A reciprocate within the casing B, and in its rearward motion compresses the recoil spring C which latter has an abutment on a flange 9 of the firing pin body 2 and on the end cap D. The bolt A in the form shown has three principal parts, the forward or slipper portion l engaging the interior of the cylindrical casing B, an inner concentric firing pin body 2, and an intermediate sleeve 3. These three parts are each capable of relative axial movement or of combined movement. Said sleeve 3 has rear and forward parts of differing diameters providing a shoulder 4, said shoulder adapted to engage the terminal rim of bolt part I and enable sleeve 3 to have its fore part 3a internal of bolt part I whilst its rear part 3b is in external alignment with the rear outer extremity of the shoulder 5. The sleeve part 3a is flanged at B and carries the forward end of spring 'i which abuts rearward upon shoulder 8 of the firing pin body 2 The firing pin body 2 has a flange 9 which constitutes one abutment for the recoil spring C, the other aboutment being the recess H] in the end cap D. The braking device consists of a continuous or discontinuous ring 12, see Fig. 2, having a flanged head l3, the outer flange adapted to engage the rear end of the casing B, said ring having a small permissible axial movement between the casing rim B and the inside rear face of cap D. The ring i2 is mounted externally of the recoil spring C and is formed with a series of axially cut leaves I4, each of a section tapering as at l5 forward, the said forward extremities being flared outwardly as at H5.
The bolt is positioned in Fig. 1 in the cooked position, the sear E engaging the shoulder F formed upon the foreface of the boltA. The sear in the known manner is under control of the trigger G in conjunction with a fire selection device H. Part 2 situated within bolt A carries the firing pin J.
The operation of the invention is as follows:
Referring to Fig. 3, the bolt A is shown in its firing position, the fore part engaging the breech of barrel K. Under this condition the recoil spring C is fully extended, and the firing pin J in its operative position, the base of the inner firing pin body 2 contacting the rear wall of the bolt socket with the spring '5 extended. As a result of the explosive charge being initiated by the firing pin J the bolt A as a'whole then starts to move carrying the sleeve 3 compressing the recoil spring C, until the sleeve part 31) enters the flared throat H5 of the spring leaves M of the brake ring 42. The said spring leaves press upon the sleeve 3 and exert therefore a continuously increasing frictional resistance to the passage rearward of the bolt as a whole, in addition to the increasing resistance of the recoil spring 0.
Finally the motion of the bolt is arrested and under urge of the recoil spring C the bolt A comprising the fore part, sleeve 3 and firing pin body 2 is forced outward again for a further operation to fire unless the said bolt is restrained in its longitudinal motion by the sear under trigger and fire control as shown in Fig. 1.
During the forward movement of the bolt as a whole the firing pin body abuts upon the rear face of the bolt A and the sleeve 3 may have relative motion but drag behind by reason of the frictional grip of the brake [2 upon its rear periphery. Should this happen the flange abutment 9 engages the shoulder 4 of the sleeve 3 with momentum and causes the sleeve to disengage and move into the position shown in Fig. 1, the spring I assisting this operation.
Under all conditions the force of the recoil spring 0 is sufiicient to overcome any momentum of the composite bolt A, as well as the friction of the braking ring lz'upon the sleeve 3.
With weak ammunition the rearward travel of the bolt against the recoil spring may not be sufficient for the bolt parts to engage the brake,
4 and the bolt comes to a position of limit of travel as shown in Fig. 1. The brake ring l2 may be either a continuous or discontinuous ring, the discontinuous form shown in Fig. 2a, however, enabling the brake fitting to be applied to a variety of weapons ofthe same class, having small divergencies of diameter of the bolt race casing B.
Again, in other forms of bolt construction, for instance where the firing pin is a solid entity on the face of the bolt, the firing pin body 2 and independent sleeve 3 are dispensed with, and the rear of the bolt formed to engage the braking device, see Fig. 4.
In order to provide means of easing any tendency to grip between the sleeve 3 and the braking device l2 the sleeve 3 may be provided with an inclined slot 20 into which the pin 2| enters, said pin conveniently being the stem of the conventional cocking handle. The interengagement of the said pin 2! with the walls of the slot 20 causes slight rotation of the sleeve 3. This feature is of importance should grit or other adventitious matter be lodged in the split sleeve and tend to create a binding action between the engaged parts. The effect of this turning movement is to assist disengagement and transfer any grit allowing it to escape through the nearest interstice between the component leaves of the brake ring.
. In weapons having a rectangular form of bolt block, flat friction braking pads can be fittedinstead of cylindrical parts. Again, the split ring I2 above referred to can be dispensed with by forming the said ringasa part of the bolt race casing or wall of breech block, as shown in Fig. 3a.
By the means above described the 'rateoffire is brought under control despite variation in the explosive energy of the ammunition used and continuous firing with weak ammunition eliminated. In such latter connection the shoulder F on bolt A may, if required, be placed further rearward, the sear E travelling in a groove out in the bolt (-not shown) until the shoulder is reached. r
I claim:
In an automatic firearm, the combination of a reciprocatory breech bolt, a recoil spring therefor, a friction brake in telescopic relation with the bolt and engageable frictionally therewith during the recoil thereof, and means for imparting relative rotation between saidbolt and'friction brake during reciprocation of said bolt.
GEORGE WILLIAM PATCHETT.
REFERENCES CITED The following. references are of record in the file of this patent:
UNITED STATES PATENTS Great Britain Nov. 10;, 1927
US557293A 1943-04-01 1944-10-05 Recoil mechanism for automatic firearms Expired - Lifetime US2426563A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667817A (en) * 1947-10-24 1954-02-02 Jr Harry A Asby Rotatable bolt for submachine guns
US2816484A (en) * 1951-08-27 1957-12-17 Richard R Grages Automatic firearm of the blow back type
DE1176028B (en) * 1961-03-13 1964-08-13 Inst Nac De Ind Friction brake for an automatic firearm
US20060236853A1 (en) * 2005-04-26 2006-10-26 Enidine, Inc. Hydraulic bolt buffer for firearm
US20150260469A1 (en) * 2013-03-15 2015-09-17 Lwrc International Llc Firearm buffer system and buttstock assembly
US9448034B2 (en) 2014-07-09 2016-09-20 Sturm, Ruger & Company, Inc. Recoil reduction system for firearm
US9506706B2 (en) 2014-07-24 2016-11-29 Sturm, Ruger & Company, Inc. Magazine for firearm
US9506711B2 (en) 2012-07-31 2016-11-29 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
US9506702B2 (en) 2014-01-10 2016-11-29 Jv Precision Machine Company Externally loading semi-automatic firearm with integral or non-removable feeding device
US20160370135A1 (en) * 2015-05-18 2016-12-22 Francis M. Plumb Recoil Impulse Reducing Bolt Carrier Group for Firearms
US9658011B2 (en) 2011-08-17 2017-05-23 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US9772150B2 (en) 2012-07-31 2017-09-26 Lwrc International Llc Firearm receiver assembly
US9810495B2 (en) 2011-08-17 2017-11-07 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US9816546B2 (en) 2012-07-31 2017-11-14 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
DE102021004902A1 (en) 2021-09-29 2023-03-30 Albert Hirt Locking spring device for a handgun, handgun with a locking spring device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US717813A (en) * 1902-10-31 1903-01-06 Chester W Prann Door-check.
US813802A (en) * 1905-10-16 1906-02-27 Winchester Repeating Arms Co Firearm.
US1356191A (en) * 1918-11-23 1920-10-19 Alvin M Craig Buffer for guns
US1548708A (en) * 1923-09-24 1925-08-04 John M Browning Recoil buffer for automatic guns
GB279988A (en) * 1926-09-17 1927-11-10 William Griffiths Jackson Improvements in door or like engaging and holding appliances
US2116444A (en) * 1937-12-06 1938-05-03 Maier Louis Combination door bumper and holder
US2301248A (en) * 1939-03-21 1942-11-10 Western Cartridge Co Breech-bolt checking construction for automatic firearms

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US717813A (en) * 1902-10-31 1903-01-06 Chester W Prann Door-check.
US813802A (en) * 1905-10-16 1906-02-27 Winchester Repeating Arms Co Firearm.
US1356191A (en) * 1918-11-23 1920-10-19 Alvin M Craig Buffer for guns
US1548708A (en) * 1923-09-24 1925-08-04 John M Browning Recoil buffer for automatic guns
GB279988A (en) * 1926-09-17 1927-11-10 William Griffiths Jackson Improvements in door or like engaging and holding appliances
US2116444A (en) * 1937-12-06 1938-05-03 Maier Louis Combination door bumper and holder
US2301248A (en) * 1939-03-21 1942-11-10 Western Cartridge Co Breech-bolt checking construction for automatic firearms

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667817A (en) * 1947-10-24 1954-02-02 Jr Harry A Asby Rotatable bolt for submachine guns
US2816484A (en) * 1951-08-27 1957-12-17 Richard R Grages Automatic firearm of the blow back type
DE1176028B (en) * 1961-03-13 1964-08-13 Inst Nac De Ind Friction brake for an automatic firearm
US20060236853A1 (en) * 2005-04-26 2006-10-26 Enidine, Inc. Hydraulic bolt buffer for firearm
US7131367B1 (en) * 2005-04-26 2006-11-07 Enidine, Inc. Hydraulic bolt buffer for firearm
US11828560B2 (en) 2011-08-17 2023-11-28 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US11067352B2 (en) 2011-08-17 2021-07-20 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US10309739B2 (en) 2011-08-17 2019-06-04 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US11662169B2 (en) 2011-08-17 2023-05-30 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US9810495B2 (en) 2011-08-17 2017-11-07 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US9658011B2 (en) 2011-08-17 2017-05-23 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US11493292B2 (en) 2011-08-17 2022-11-08 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US10598452B2 (en) 2011-08-17 2020-03-24 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US9506711B2 (en) 2012-07-31 2016-11-29 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
US10697726B2 (en) 2012-07-31 2020-06-30 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
US9772150B2 (en) 2012-07-31 2017-09-26 Lwrc International Llc Firearm receiver assembly
US11530892B2 (en) 2012-07-31 2022-12-20 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
US9816546B2 (en) 2012-07-31 2017-11-14 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
US10895430B2 (en) 2012-07-31 2021-01-19 Lwrc International Llc Firearm receiver assembly
US10240883B2 (en) 2012-07-31 2019-03-26 Lwrc International Llc Firearm receiver assembly
US11686548B2 (en) 2012-07-31 2023-06-27 Lwrc International Llc Firearm receiver assembly
US10808748B2 (en) 2012-07-31 2020-10-20 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
US11898589B2 (en) 2012-07-31 2024-02-13 Lwrc International Llc Barrel nut assembly and method to attach a barrel to a firearm using such assembly
US11460265B2 (en) 2013-03-15 2022-10-04 Lwrc International Llc Firearm buffer system and buttstock assembly
US10591245B2 (en) 2013-03-15 2020-03-17 Lwrc International Llc Firearm buffer system and buttstock assembly
US9915497B2 (en) 2013-03-15 2018-03-13 Lwrc International Llc Firearm buffer system and buttstock assembly
US9625232B2 (en) * 2013-03-15 2017-04-18 Lwrc International Llc Firearm buffer system and buttstock assembly
US20230097029A1 (en) * 2013-03-15 2023-03-30 Lwrc International Llc Firearm buffer system and buttstock assembly
US20160252322A1 (en) * 2013-03-15 2016-09-01 Lwrc International Llc Firearm buffer system and buttstock assembly
US9291414B2 (en) * 2013-03-15 2016-03-22 Lwrc International Llc Firearm buffer system and buttstock assembly
US20150260469A1 (en) * 2013-03-15 2015-09-17 Lwrc International Llc Firearm buffer system and buttstock assembly
US9506702B2 (en) 2014-01-10 2016-11-29 Jv Precision Machine Company Externally loading semi-automatic firearm with integral or non-removable feeding device
US9448034B2 (en) 2014-07-09 2016-09-20 Sturm, Ruger & Company, Inc. Recoil reduction system for firearm
US9506706B2 (en) 2014-07-24 2016-11-29 Sturm, Ruger & Company, Inc. Magazine for firearm
US20160370135A1 (en) * 2015-05-18 2016-12-22 Francis M. Plumb Recoil Impulse Reducing Bolt Carrier Group for Firearms
DE102021004902A1 (en) 2021-09-29 2023-03-30 Albert Hirt Locking spring device for a handgun, handgun with a locking spring device

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