US3366011A - Buffer assembly having a plurality of inertial masses acting in delayed sequence to oppose bolt rebound - Google Patents

Buffer assembly having a plurality of inertial masses acting in delayed sequence to oppose bolt rebound Download PDF

Info

Publication number
US3366011A
US3366011A US543242A US54324266A US3366011A US 3366011 A US3366011 A US 3366011A US 543242 A US543242 A US 543242A US 54324266 A US54324266 A US 54324266A US 3366011 A US3366011 A US 3366011A
Authority
US
United States
Prior art keywords
bolt
buffer
recoil
assembly
bolt carrier
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.)
Expired - Lifetime
Application number
US543242A
Other languages
English (en)
Inventor
Foster E Sturtevant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Colts Inc
Original Assignee
Colts Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24167178&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3366011(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Colts Inc filed Critical Colts Inc
Priority to US543242A priority Critical patent/US3366011A/en
Priority to GB48948/66A priority patent/GB1114370A/en
Priority to ES0334681A priority patent/ES334681A1/es
Priority to FR48061A priority patent/FR1505258A/fr
Priority to BE691492D priority patent/BE691492A/xx
Priority to DE19671578368 priority patent/DE1578368A1/de
Priority to CH241767A priority patent/CH445343A/de
Publication of US3366011A publication Critical patent/US3366011A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/70—Anti-rebound arrangements, i.e. preventing rebound of the bolt out of the firing position
    • 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
    • F41A3/82—Coil spring buffers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C23/00—Butts; Butt plates; Stocks
    • F41C23/06—Stocks or firearm frames specially adapted for recoil reduction

Definitions

  • An automatic firearm having a bolt assembly and a coaxial recoil assembly mounted for rectilinear movement between battery and recoil positions at a high rate of reciprocation wherein the recoil assembly is provided a longitudinal cavity housing an elongated mass segmented into a plurality of coaxial weights spaced apart by washers having a low coefiicient of restitution, the weights having a lost motion connection with each other and with the recoil assembly to apply their respective inertias in a delayed sequence to oppose rebound of the bolt assem bly from battery position.
  • the present invention relates to an automatic firearm and more particularly to a new and improved recoil or bulfer assembly therefor.
  • Another object of the present invention is to provide an improved buffer assembly which repetitively assures uniform and adequate firing pin protrusion when the bolt assembly is in battery position.
  • Another object of this invention is to provide a means for overcoming any adverse effects of bolt carrier bounce or rebound from battery position at the return thereof after recoil. Included in this object is the provision of a bufier having a low coefficient of restitution to minimize the secondary rebound thereof.
  • a further object of the present invention is to provide an improved buffer assembly which exhibits not only the functional characteristics mentioned hereinbefore but is of simple and compact design so that it is adapted to be applied on a retrofit basis.
  • FIG. 1 is a fragmentary side elevational view partially broken away and partially in section of a firearm containing the improved buffer assembly of this invention
  • FIG. 2 is an enlarged sectional view showing the improved buffer assembly and bolt carirer as it approaches battery position after recoil;
  • FIG. 3 is an external view of intermediate size showing the improved buffer
  • FIG. 4 is an end view of FIG. 3;
  • FIG. 5 is an enlarged cross-sectional view of the buffer of FIG. 3 taken along lines 5-5 of FIG. 3;
  • FIG. 6 is a fragmentary enlarged section view showing a second embodiment of the buffer assembly of the present invention.
  • FIG. 1 shows an automatic firearm 10 of the gas operated type.
  • the firearm It comprises a receiver 12 defining in the upper portion thereof a chamber 14 for receiving a bolt assembly.
  • the rear of the chamber 14 communicates with a receiver extension 16 located in stock 18.
  • Operatively connected forwardly of the chamber 14 is a barrel 2% having a cartridge chamber 22 in which may be positioned a cartridge 24.
  • the trigger mechanism 30 is generally similar to design and operation to the mechanism described in my prior Patent No. 3,236,155, issued Feb. 22, 1966, and is not described in detail herein.
  • the spring-biased hammer 36 is released to rotate clockwise through slot 43 of bolt carrier 42 to strike firing pin 38 to fire the cartridge 24 whereupon a portion of the expanding gas developed on firing the gun passes through a passage 49 in the bolt carrier 42 to actuate the automatic recoil of the bolt and bolt carrier, causing ejection of the spent cartridge shell and subsequent successive chambering of cartridges 24 located in cartridge chamber or magazine 26 as the bolt carrier returns to battery position after recoil.
  • the chamber 44 defined by the bolt 46 and the bolt carrier 42 fills with high pressure exhaust gas on the firing of a cartridge 24 driving the bolt carrier 42 rearwardly within the chamber 14 against the bias of recoil spring 64 and initially causing the annular shoulder 48 of the carrier 42 to contact the flange 50 of firing pin 38 while at the same time by virtue of the lost motion connection between the carrier 42 and the bolt 46 causing the bolt cam pin 52 to travel in the helical slot 54 cut in the bolt carrier 42 (FIG. 1).
  • the movement of the cam pin 52 within the helical slot 54 causes relative rotation of the bolt 46 and the bolt carrier 42, the latter being held against rotation by the cooperation of carrier key 56 with the longitudinal groove 58 of the receiver 12.
  • Rotation of bolt 46 results in the registry of bolt lugs 60 and the slots between the inwardly protruding lugs 62 on the breech end of the barrel thereby permitting rearward movement of the bolt and bolt carrier upon continuing recoil of the carrier.
  • the rearward momentum of the recoiling bolt assembly is absorbed by the compression of recoil spring 64 which, upon dissipation of the rearward momentum of the carrier, acts upon the bolt assembly to return it to locked battery position.
  • the expended cartridge 24 is, of course, ejected and a new cartridge 24 is fed from the magazine 26 into the firing chamber 22.
  • the bolt 46 be fully closed and locked and that the bolt carrier 42 be in its full forward position in order to fire the gun. It the bolt carrier 42 is moved up to battery position but rebounds or bounces momentarily at battery impact, it is possible for the annular shoulder 48 of the bolt carrier to engage the flange 50 of the firing pin 38 so that the forward movement of the firing pin is limited despite the fact that the bolt lugs 60 and the depending lugs 62 on the breech end of the barrel are in locked battery position if the hammer 36 should strike the firing pin under automatic firing operation during the short interval measured in milliseconds, before the recoil spring 64 returns the bolt carrier 42 to its full forward position.
  • the present invention provides means for avoiding this condition by controlling the bounce or rebound of the bolt carrier at battery impact and absorbing the bounce energy thereof.
  • the recoil assembly includes a generally tubular buffer body 66 having a closed forward end engaging the rearward end of bolt carrier 42 and mounted for reciprocation in receiver extension 16.
  • the buffer is preferably formed of a lightweight aluminum alloy to provide a low coefficient of restitution to minimize buffer rebound from or separation of the buffer from the carrier at battery impact and is provided with generally annular guide flanges 68 and 70 to mount the same in the tube extension 16 with the flange 70 further providing a seat for the end of recoil spring 64 which concentrically surrounds the rearward end of the buffer member 66.
  • the flanges 68 and 70 are provided with flats 67 on the periphery thereof to minimize the pressurization of the air within the tube 16 during the recoil operation.
  • a plug 72 Disposed within the open end of the buffer tube 66 is a plug 72 which is secured therein by transverse pin 74, and a screw 78 mounts on the rearward end thereof a bumper 76 preferably formed of polyurethane of high durometer hardness to minimize the shock waves and vibrations otherwise imposed by a sharp blow as the buffer bottoms in receiver extension 16 at recoil position.
  • the plug 72 which is shown as being formed of aluminum is provided with an annular groove 79 into which is crimped portions 81 of a wall of the aluminum buffer 66 and is sealed thereto by any suitable means to prevent the entry of liquids or contaminants into the buffer 66. If desired and as shown in FIG.
  • a plug 72a and bumper 76a may be integrally molded from polyurethane and assembled in the buffer as illustrated. Due to the limited resiliency of polyurethane, the body of the plug 72a may be slightly larger in relaxed condition, than the bore of buffer 66a to seal the same against leakage.
  • weights 80 Disposed within the buffer 66 is a plurality of weights 80 (shown as being five in number). Interposed between each adjacent pair of weights 80 and between the forward weight 80 and the buffer end 68 is a washer 82 formed of a material having a very low coefficient of restitution, or resiliency, such as buna N rubber or polyurethane. As shown in the drawings, the combined length of the weights 80 and the washers 82 is less than the length of the bore between the end wall 84 of the plug 72 and the closed end wall at the other end of the buffer. It is desirable that the weights 80 be as heavy as possible with respect to the butter 66 in order to provide the maximum amount of effective force resisting carrier bounce at battery position as hereinafter more fully described.
  • the operation of the gun under automatic operation is as follows.
  • the trigger 34 is pulled to release the hammer 36 which moves upwardly through the vertical slot 43 in the bolt carrier 42 to strike the firing pin 38 to fire the cartridge 24 chambered in the gun barrel.
  • the expanding gas due to the discharge of the cartridge, forces the bolt carrier 42 and after a time delay as hereinbefore described, the bolt 46, rearwardly against the bias of spring 64 which absorbs the recoil.
  • the bumper 76 which is formed of a material having a low coeflicient of restitution, bottoms against the end wall of the tube extension 16 with the bumper 76 reducing the sharpness of the shock waves which the buffer might otherwise transmit through the recoil mechanism and the bolt carrier mechanism.
  • the weights 80 being loosely disposed in the buffer 66, move to the rear of the buffer and are bottomed in its rearward position at the moment of impact due to the reducing velocity of the buffer as it moves toward recoil position against the bias of spring 64.
  • the forward movement of the bolt carrier 42 also releases the hammer for firing the newly chambered cartridge and allows a very few milliseconds for the bo t and bolt carrier to be positioned in the proper position for firing.
  • the spring 64 must have a sufiicient spring rate to thrust the bolt carrier forward rapidly and the result is that the bolt carrier strikes the end of the gun barrel with considerable impact at battery position, and due to the resiliency of the steel which forms these parts, there is a considerable bounce moving the bolt carrier 42 away from full forward position.
  • the firing pin if struck by the hammer during the transient interval before this occurs, may have insuflicient penetration of the primer cap to fire the chambered cartridge.
  • FIG. 2 which illustrates the buffer and bolt carrier as they approach battery position
  • the weights are spaced from the forward end 68 of the buffer 66.
  • rebound of the bolt carrier 42 occurs, it tends to move buffer 66 to the left as viewed in FIG. 2 against the bias of spring 64.
  • the inertia of the weights 80 will cause them to continue to move to the right as the result of the lost motion connection produced by the clearance between the weights 80 and the end of the buffer 66 to produce a slightly delayed force or to oppose the rearward movement of the butter as viewed in FIG. 2.
  • the plurality of weights 80 are spaced apart by washers 82 to provide, in effect, lost motion connections between each of the several weights 80.
  • the weights 80 do not act entirely in unison but act sequentially with respect to each other in overcoming the bounce of the bolt carrier in battery position to produce a series of forces which are out-of-phase with any further oscillation of the bolt carrier 42 while at the same time providing the full amount of inertia required to overcome the primary bounce of the bolt carrier 42 at battery position.
  • washers 82 having a low coefiicient of restitution minimizes the bounce of the weights 80 within the buffer 66 despite the elasticity of the steel weights which further assist the out-of-phase application of the inertia force of the individual weights.
  • the present invention assures that the bounce of the bolt carrier 42 at battery position under the severe shock and impact conditions encountered under automatic firing of high speed, high performance firearms is minimized in a simple and foolproof design requiring no field adjustment during a long service life.
  • a receiver having a longitudinal cavity, a bolt assembly mounted in said cavity for reciprocal movement between recoil and battery positions, a recoil assembly mounted in said cavity for rectilinear movement with said bolt assembly between recoil and battery positions, said recoil assembly comprising means to bias the bolt assembly toward battery position and a buffer mounting an elongated mass segmented into a plurality of coaxial weights, said weights having a lost motion connection with said buffer and with each other for transmitting to the bolt assembly the force resulting from their inertia in moving toward battery position in a delayed sequence after the bolt assembly reaches battery position.
  • a device as recited in claim 4 wherein said longitudinal cavity provided by said butter is sealed against the entry of contaminants.
  • a device as recited in claim 4 wherein said bolt assembly comprises a bolt carrier and a bolt having limited relative reciprocal movement therebetween.
  • a bolt assembly mounted for reciprocal movement between recoil and battery positions, said assembly comprising a bolt carrier and a bolt having a limited lost motion connection therewith, a

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Battery Mounting, Suspending (AREA)
  • Springs (AREA)
  • Vibration Dampers (AREA)
US543242A 1966-04-18 1966-04-18 Buffer assembly having a plurality of inertial masses acting in delayed sequence to oppose bolt rebound Expired - Lifetime US3366011A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US543242A US3366011A (en) 1966-04-18 1966-04-18 Buffer assembly having a plurality of inertial masses acting in delayed sequence to oppose bolt rebound
GB48948/66A GB1114370A (en) 1966-04-18 1966-11-01 Buffer assembly
ES0334681A ES334681A1 (es) 1966-04-18 1966-12-03 Perfeccionamientos en las armas de fuego automaticas portatiles.
FR48061A FR1505258A (fr) 1966-04-18 1966-12-14 Dispositif amortisseur pour arme à feu automatique
BE691492D BE691492A (no) 1966-04-18 1966-12-20
DE19671578368 DE1578368A1 (de) 1966-04-18 1967-02-14 Feuerwaffe
CH241767A CH445343A (de) 1966-04-18 1967-02-20 Feuerwaffe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US543242A US3366011A (en) 1966-04-18 1966-04-18 Buffer assembly having a plurality of inertial masses acting in delayed sequence to oppose bolt rebound

Publications (1)

Publication Number Publication Date
US3366011A true US3366011A (en) 1968-01-30

Family

ID=24167178

Family Applications (1)

Application Number Title Priority Date Filing Date
US543242A Expired - Lifetime US3366011A (en) 1966-04-18 1966-04-18 Buffer assembly having a plurality of inertial masses acting in delayed sequence to oppose bolt rebound

Country Status (7)

Country Link
US (1) US3366011A (no)
BE (1) BE691492A (no)
CH (1) CH445343A (no)
DE (1) DE1578368A1 (no)
ES (1) ES334681A1 (no)
FR (1) FR1505258A (no)
GB (1) GB1114370A (no)

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977296A (en) * 1974-12-04 1976-08-31 Colt Industries Operating Corporation (Firearms Division) Hydraulic buffer assembly for automatic or semiautomatic firearm
US4244273A (en) * 1978-12-04 1981-01-13 Langendorfer Plastics Corporation Rifle modification
US4512101A (en) * 1983-10-19 1985-04-23 Chandler Evans Inc. Rifle buttstock assembly
US5279202A (en) * 1991-07-29 1994-01-18 Benelli Armi S.P.A. Bolt repositioning device for firearms
WO1997048958A1 (en) 1996-06-19 1997-12-24 Colt's Manufacturing Company, Inc. Gas operated firearm
US5909002A (en) * 1997-10-09 1999-06-01 Atchisson; Maxwell G. Buffer for firearm
US6418833B1 (en) * 1999-10-01 2002-07-16 Jeffrey A. Hajjar Recoil spring tube assembly
US6684547B2 (en) 2001-10-31 2004-02-03 Cape Aerospace Firearm recoil dampening assembly
US6829974B1 (en) * 2003-12-12 2004-12-14 Mack W. Gwinn, Jr. Firearm buffer system
US20060236853A1 (en) * 2005-04-26 2006-10-26 Enidine, Inc. Hydraulic bolt buffer for firearm
US20080110074A1 (en) * 2006-11-15 2008-05-15 Endine, Inc. Hydraulic recoil buffer assembly
US20090126249A1 (en) * 2006-12-19 2009-05-21 Richard Vance Crommett Firearm modification method and kit assembly
US20100251588A1 (en) * 2009-04-03 2010-10-07 Abrams Airborne Spring enhanced buffer for a firearm
US20120180648A1 (en) * 2011-01-14 2012-07-19 ArmWest, LLC. Firearm
US8261653B2 (en) 2007-06-18 2012-09-11 Richard Vance Crommett Firearm having a new gas operating system
WO2012097334A3 (en) * 2011-01-14 2013-08-15 ArmWest, LLC Firearm
US8800424B2 (en) * 2012-06-02 2014-08-12 J & K Ip Assets, Llc Captured spring assembly for a firearm
US20140224112A1 (en) * 2013-01-18 2014-08-14 Christopher Verry Adjustable Weight Firearm Buffer
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
US9080823B1 (en) 2014-11-18 2015-07-14 Dimitrios Mantas Buffer assembly
US20150323269A1 (en) * 2014-02-05 2015-11-12 S. I. Defense, Inc. Carrier guide and firearm
US9488423B2 (en) 2011-01-14 2016-11-08 Arm West, Llc Firearm systems and methods
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
US9658011B2 (en) 2011-08-17 2017-05-23 Lwrc International Llc Bolt carrier and bolt for gas operated firearms
US20170160027A1 (en) * 2015-12-03 2017-06-08 J & K Ip Assets, Llc Firearm bolt assembly for a self-loading firearm
US20170299295A1 (en) * 2015-10-09 2017-10-19 Casimir Pawlowski Firearm and firearm buffer 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
US9915497B2 (en) 2013-03-15 2018-03-13 Lwrc International Llc Firearm buffer system and buttstock assembly
US20180224227A1 (en) * 2016-09-28 2018-08-09 Claude A. Durham, III B.l.t. bolt carrier
US10240883B2 (en) 2012-07-31 2019-03-26 Lwrc International Llc Firearm receiver assembly
US10488136B2 (en) 2016-09-23 2019-11-26 ArmWest, LLC Selective fire firearm systems and methods
US10782082B2 (en) 2017-10-20 2020-09-22 Sturm, Ruger & Company, Inc. Bolt assembly for blowback type firearms
US10852083B2 (en) * 2018-12-07 2020-12-01 James Matthew Underwood Buffer extension
US10982918B2 (en) 2019-01-21 2021-04-20 Abrams Airborne Manufacturing, Inc. Firearm buffers as well as methods of assembling same
US11209229B2 (en) * 2019-10-07 2021-12-28 Roberto Perez Firearm and linear-to-rotary converter assembly
US11378347B2 (en) * 2019-07-24 2022-07-05 Bravo Company Mfg, Inc. Buffer with magnetic bias
US11454468B1 (en) 2021-03-22 2022-09-27 J&E Machine Tech, Inc. Recoil buffer assembly
US11656042B2 (en) * 2016-09-28 2023-05-23 Claude A. Durham, III Bolt assembly
US11692785B1 (en) * 2022-01-14 2023-07-04 Unrivaled Armory LLC Buffer assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6109541A (en) * 1998-07-23 2000-08-29 Caterpillar Inc. Apparatus for reducing the bounce of a poppet valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US784966A (en) * 1902-12-03 1905-03-14 William D Condit Gas-operated machine-gun.
US2155130A (en) * 1936-08-06 1939-04-18 Hanel Franz Antiskidding device for motor vehicles
US3242812A (en) * 1963-09-19 1966-03-29 Brevets Aero Mecaniques Semi-automatic or automatic guns
US3283435A (en) * 1963-10-30 1966-11-08 Heckler & Koch Gmbh Breech closure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US784966A (en) * 1902-12-03 1905-03-14 William D Condit Gas-operated machine-gun.
US2155130A (en) * 1936-08-06 1939-04-18 Hanel Franz Antiskidding device for motor vehicles
US3242812A (en) * 1963-09-19 1966-03-29 Brevets Aero Mecaniques Semi-automatic or automatic guns
US3283435A (en) * 1963-10-30 1966-11-08 Heckler & Koch Gmbh Breech closure

Cited By (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977296A (en) * 1974-12-04 1976-08-31 Colt Industries Operating Corporation (Firearms Division) Hydraulic buffer assembly for automatic or semiautomatic firearm
US4244273A (en) * 1978-12-04 1981-01-13 Langendorfer Plastics Corporation Rifle modification
US4512101A (en) * 1983-10-19 1985-04-23 Chandler Evans Inc. Rifle buttstock assembly
US5279202A (en) * 1991-07-29 1994-01-18 Benelli Armi S.P.A. Bolt repositioning device for firearms
US5827992A (en) * 1996-06-19 1998-10-27 Colt's Manufacturing Company, Inc. Gas operated firearm
US5726377A (en) * 1996-06-19 1998-03-10 Colt's Manufacturing Company, Inc. Gas operated firearm
WO1997048958A1 (en) 1996-06-19 1997-12-24 Colt's Manufacturing Company, Inc. Gas operated firearm
US5909002A (en) * 1997-10-09 1999-06-01 Atchisson; Maxwell G. Buffer for firearm
US6418833B1 (en) * 1999-10-01 2002-07-16 Jeffrey A. Hajjar Recoil spring tube assembly
US6684547B2 (en) 2001-10-31 2004-02-03 Cape Aerospace Firearm recoil dampening assembly
US6829974B1 (en) * 2003-12-12 2004-12-14 Mack W. Gwinn, Jr. Firearm buffer system
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
US7681351B2 (en) 2006-11-15 2010-03-23 Enidine, Inc. Hydraulic recoil buffer assembly
US20080110074A1 (en) * 2006-11-15 2008-05-15 Endine, Inc. Hydraulic recoil buffer assembly
US20090126249A1 (en) * 2006-12-19 2009-05-21 Richard Vance Crommett Firearm modification method and kit assembly
US8261653B2 (en) 2007-06-18 2012-09-11 Richard Vance Crommett Firearm having a new gas operating system
US20100251588A1 (en) * 2009-04-03 2010-10-07 Abrams Airborne Spring enhanced buffer for a firearm
US8296984B2 (en) * 2009-04-03 2012-10-30 Abrams Airborne Manufacturing Inc. Spring enhanced buffer for a firearm
US8973483B2 (en) 2010-03-25 2015-03-10 Arm West, Llc Gas regulator system
US8813406B1 (en) 2010-03-25 2014-08-26 ArmWest, LLC High capacity magazine with multiple springs
US9488423B2 (en) 2011-01-14 2016-11-08 Arm West, Llc Firearm systems and methods
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
US20120180648A1 (en) * 2011-01-14 2012-07-19 ArmWest, LLC. Firearm
US9038525B2 (en) * 2011-01-14 2015-05-26 ArmWest, LLC Firearm
US10415906B2 (en) * 2011-01-14 2019-09-17 ArmWest, LLC Firearm systems and methods
US20170045317A1 (en) * 2011-01-14 2017-02-16 Arm West, Llc Firearm Systems and Methods
US9228786B2 (en) 2011-01-14 2016-01-05 ArmWest, LLC Quick barrel change firearm
US11067352B2 (en) 2011-08-17 2021-07-20 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
US11828560B2 (en) 2011-08-17 2023-11-28 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
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
US8800424B2 (en) * 2012-06-02 2014-08-12 J & K Ip Assets, Llc Captured spring assembly for a firearm
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
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
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
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
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
US10895430B2 (en) 2012-07-31 2021-01-19 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
US20140224112A1 (en) * 2013-01-18 2014-08-14 Christopher Verry Adjustable Weight Firearm Buffer
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
US9506702B2 (en) 2014-01-10 2016-11-29 Jv Precision Machine Company Externally loading semi-automatic firearm with integral or non-removable feeding device
US20150323269A1 (en) * 2014-02-05 2015-11-12 S. I. Defense, Inc. Carrier guide and firearm
US9080823B1 (en) 2014-11-18 2015-07-14 Dimitrios Mantas Buffer assembly
US10054378B2 (en) * 2015-10-09 2018-08-21 TCC Solutions Firearm and firearm buffer assembly
US20170299295A1 (en) * 2015-10-09 2017-10-19 Casimir Pawlowski Firearm and firearm buffer assembly
US10184739B2 (en) * 2015-12-03 2019-01-22 J & K Ip Assets, Llc Firearm bolt assembly for a self-loading firearm
US20170160027A1 (en) * 2015-12-03 2017-06-08 J & K Ip Assets, Llc Firearm bolt assembly for a self-loading firearm
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
US11656042B2 (en) * 2016-09-28 2023-05-23 Claude A. Durham, III Bolt assembly
US20180224227A1 (en) * 2016-09-28 2018-08-09 Claude A. Durham, III B.l.t. bolt carrier
US20230272990A1 (en) * 2016-09-28 2023-08-31 Claude A. Durham, III Bolt assembly
US10782082B2 (en) 2017-10-20 2020-09-22 Sturm, Ruger & Company, Inc. Bolt assembly for blowback type firearms
US10852083B2 (en) * 2018-12-07 2020-12-01 James Matthew Underwood Buffer extension
US11333456B2 (en) 2019-01-21 2022-05-17 Abrams Airborne Manufacturing, Inc. Firearm buffers as well as methods of assembling same
US10982918B2 (en) 2019-01-21 2021-04-20 Abrams Airborne Manufacturing, Inc. Firearm buffers as well as methods of assembling same
US11378347B2 (en) * 2019-07-24 2022-07-05 Bravo Company Mfg, Inc. Buffer with magnetic bias
US11209229B2 (en) * 2019-10-07 2021-12-28 Roberto Perez Firearm and linear-to-rotary converter assembly
US11454468B1 (en) 2021-03-22 2022-09-27 J&E Machine Tech, Inc. Recoil buffer assembly
US11692785B1 (en) * 2022-01-14 2023-07-04 Unrivaled Armory LLC Buffer assembly
US20230304765A1 (en) * 2022-01-14 2023-09-28 Unrivaled Armory LLC Buffer assembly

Also Published As

Publication number Publication date
ES334681A1 (es) 1967-11-01
FR1505258A (fr) 1967-12-08
BE691492A (no) 1967-05-29
CH445343A (de) 1967-10-15
DE1578368A1 (de) 1971-07-08
GB1114370A (en) 1968-05-22

Similar Documents

Publication Publication Date Title
US3366011A (en) Buffer assembly having a plurality of inertial masses acting in delayed sequence to oppose bolt rebound
US5909002A (en) Buffer for firearm
EP0054088B1 (en) Improvements in or relating to gas operated, automatic or semi-automatic guns
US3977296A (en) Hydraulic buffer assembly for automatic or semiautomatic firearm
US7213498B1 (en) Rifle
US4019423A (en) Automatic or semi-automatic firearm
US9080823B1 (en) Buffer assembly
US6829974B1 (en) Firearm buffer system
US4503632A (en) Recoil reducing mechanism for shotguns
US11378347B2 (en) Buffer with magnetic bias
US5155292A (en) Heavy support weapon
US3418880A (en) Automatic firearm with breech casing free to recoil on a support
US10775121B2 (en) Firearm mechanism
EP0283104A1 (en) Firing mechanism for air weapons
US3672255A (en) Equal impulse firearm
US2831404A (en) Recoil buffer for guns
CN212058476U (zh) 一种机载气体发射的后座力调节器
JPH0650696A (ja) 火器の可動部のはね返りを減速する装置
US11686541B2 (en) Automatic firearm having an inertial automatic system
US3410175A (en) Recoil assembly for firearm
US7055422B1 (en) Reduced recoil anti-armor gun
USH87H (en) One piece ejector/ejector spring for cartridge firing weapons
US2846926A (en) Floating barrel action for automatic pistol
US2590897A (en) Shoulder mortar
US3161978A (en) Torsion bar cartridge extractor