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| Number | Title | Issue Date |
| 7819052 | Firearm with a closing device of operative side ports of a receiver A firearm includes a closing device of operative side ports of a receiver, a bolt assembly and the receiver equipped on at least one side with an operational port. The bolt assembly includes a bolt, a bolt-holder slide carrying a cocking handle and an inertial retur... | 10/26/2010 |
| 7131367 | Hydraulic bolt buffer for firearm A hydraulic bolt buffer assembly for an automatic firearm, the firearm including a receiver having a longitudinal chamber, a bolt and carrier assembly mounted in the chamber for reciprocating movement between a recoil position and a battery position, a spring for ur... | 11/07/2006 |
| 7032340 | Breech construction for firearms In an autoloading gun construction having the breach end of a barrel removably assembled to the forward end of a barrel extension which is positioned between and secured to wall sections of two opposing receiver plates of a receiver section, the improvement comprisi... | 04/25/2006 |
| 6931978 | Rebound attenuation device for automatic firearms A blow-back operating automatic firearm has a sliding mass carried with its bolt carrier assembly to increase the dwell time of the bolt at the breech when the bolt is in battery position for firing. The sliding mass reduces the tendency of the bolt to bounce-off th... | 08/23/2005 |
| 6901689 | Firearm pneumatic counter-recoil modulator and airgun thrust-adjustor An inexpensive generally retrofitable drop-in cartridge-unit of light-weight pneumatic-cylinder design for replacing the conventional metal/compression-spring member housed within the frame of a gun, thereby providing significantly smoother, quiter, more rapid, and ... | 06/07/2005 |
| 6758126 | Apparatus for initially slowly a backwards movement of a bolt group An apparatus 10 is provided for initially slowing a backwards extraction movement of a bolt group 12 of a weapon which moves backward automatically after firing and against a force of a return drive spring 14. The apparatus includes first and se... | 07/06/2004 |
| 6668478 | Firearm pneumatic counter-recoil modulator & airgun thrust-adjustor An inexpensive generally retrofitable drop-in cartridge-unit of light-weight pneumatic-cylinder design for replacing the conventional metal/compression-spring member housed within the frame of a gun, thereby providing significantly smoother, quiter, more ... | 12/30/2003 |
| 6662703 | Open bolt firing mechanism for programmable cartridges An open bolt firing mechanism for programmable cartridges. The mechanism includes a firing bolt having a bolt face configured to engage a programmable cartridge and force the programmable cartridge toward a barrel of the weapon. The mechanism also include... | 12/16/2003 |
| 6631669 | Closing spring assembly for a handgun A spring closing assembly is disclosed which is adapted to be selectively installed and removed from a firearm. The illustrated spring closing assembly includes a rod having a free forward end which defines a slot dividing the free forward end into fork p... | 10/14/2003 |
| 6571501 | Pistol caliber conversion assembly A pistol caliber conversion assembly having a slide assembly housing components of lightweight characteristics so as to accept and permit an interchange of a variety of caliber ammunition. The assembly includes a rail and groove arrangement for slidably m... | 06/03/2003 |
| 6418833 | Recoil spring tube assembly An improved recoil spring tube assembly for an auto-loading firearm includes a recoil spring slideable within a recoil spring tube and including a recoil spring follower all manufactured of a corrosion resistant material. The bore of the recoil spring tub... | 07/16/2002 |
| 6314859 | Self-loading pistol conversion kit for a locked self-loading pistol and a weapon system composed of an optionally locked or unlocked self-loading pistol An unlocked self-loading pistol and a conversion kit for modifying a locked self-loading pistol adapted for firing normal and powerful cartridges into an unlocked self-loading pistol capable of firing weak cartridges as well as normal and powerful cartrid... | 11/13/2001 |
| 5909002 | Buffer for firearm A buffer assembly for use with firearms such as the M-16 rifle, for reducing the cyclic rate of firing in full-automatic operation. The buffer assembly includes a unit of length selected to stop the bolt carrier at the desired full-recoil position, and a ... | 06/01/1999 |
| 5392689 | Recoil mechanism for handguns A recoil mechanism used to return the slide of a semi-automatic handgun back to its battery position after firing is provided having a recoil spring, a rod member and a discrete flange member. The rod and the flange member each of polymeric material have ... | 02/28/1995 |
| 5279202 | Bolt repositioning device for firearms A semiautomatic firearm including a recoil spring acting on the bolt for closing the breech after the ejection of the case. The repositioning device includes an auxiliary resilient member which cooperates with the recoil spring, so that although a low-rig... | 01/18/1994 |
| 5164537 | Small firearm with receiver A hand firearm with a casing in which the system is arranged and a valve leading from the inside of the casing to the outside which is so designed that an overpressure in the casing may be vented to the outside, in which a gas-permeable, heat conducting s... | 11/17/1992 |
| 5164534 | Secondary recoil absorption mechanism for use on a firearm A secondary recoil absorption mechanism absorbs some of the recoil energy associated with the firing of the firearm. The secondary recoil absorption mechanism includes a roller mounted on the breech block to engage a ramp element pivotally mounted on the ... | 11/17/1992 |
| 5127310 | Recoil spring assembly for a firearm A recoil spring assembly for use with a semi-automatic firearm having a slide. The assembly has an elongate guide, an elongate coil spring mounted over the guide, and an end cap snap locked onto the guide. The assembly also has a washer movably mounted on... | 07/07/1992 |
| 5081780 | Firing pin positioning system A system for movably positioning a first member relative to a second member. The system has a hole in the first member and a coiled spring/plunger member positioned in the hole. The coiled member has a section that extends out of the hole that does not po... | 01/21/1992 |
| 4977815 | Self cleaning automatic machine pistol and silencer for the same An automatic machine pistol is provided, which is not subject to fouling, which is compact and light while incorporating a pneumatic recoil buffer, which resists muzzle climb, and which can be accessed and cleaned without disassembly. The machine pistol i... | 12/18/1990 |
| 4891898 | Projectile firing weapon with a replaceable firing mechanism actuator cassette A projectile firing weapon is disclosed having a simplified construction and a consequent increase in reliability. The trigger and firing mechanism are completely contained within an easily removable and replaceable cassette which may simply be dropped in... | 01/09/1990 |
| 4821621 | Multipurpose repeating firearm having alternate firing mechanisms A relatively simple repeating firearm is disclosed which includes a sliding bolt which is removably housed within a firearm housing and which is biased into a bullet loading and firing position by means of springs provided in an overlapping fashion with a... | 04/18/1989 |
| 4807512 | Apparatus for operating the bolt in automatic weapons Automatically feeding firearm having a bolt (2) which upon shooting is reciprocally moving in the receiver (1) of the weapon actuated by a recoil spring (4), and in which the bolt (2) when being set for firing its first shot, for the purpose of executing ... | 02/28/1989 |
| 4756228 | Repeating weapon actuating spring and guide A repeating weapon in which its bolt carrier is slotted to enable an actuating spring to move laterally, carrying with it a gas piston. The spring is anchored to the receiver in such a way as to be anchored or released by axial movement. This enables a qu... | 07/12/1988 |
| 4704944 | Semi-automatic pistol A semi-automatic pistol comprises a spring driven mobile striker assembly. t its rear the spring is coiled on a post and abuts an aft stationary plate. The striker assembly comprises an integral rear plate with a hole adapted for the penetration of the pos... | 11/10/1987 |
| 4690032 | Breech/receiver assembly for automatic cannons A breech/receiver assembly for automatic cannon incorporates a rotating chamber and a recoil and counterrecoil buffer integrated within the breech. The breech, including the buffer means, recoils with the barrel and because the mass of the buffer is added... | 09/01/1987 |
| 4638716 | Machine gun receiver top strap For an automatic or semi-automatic weapon or gun, that includes a top strap for covering an open top portion of a weapon receiver group. The invention in a connector-less locking arrangement for that top strap that includes spaced apart flanges arranged a... | 01/27/1987 |
| 4619184 | Gas actuated pistol A fully gas operated pistol includes a frame unit, a barrel unit, a bolt carrier unit slidably supported on the frame unit and a spring which urges the bolt carrier unit into a forward, bolting position. A path links the breech end of the barrel with a re... | 10/28/1986 |
| 4594935 | Breech locking system for self loading fire arms In a locked-breech, short recoil, pistol type fire arm, the breech block slide (B) is provided with a separate locking block (E) engageable with both the barrel (C) and the slide (B) and accommodated between the underside of the barrel (C) and the upper s... | 06/17/1986 |
| 4593601 | Recoil spring system for self loading fire arms A recoil spring system for a self-loading pistol type fire arm having a reciprocating breech block slide comprises a pair of compression springs (P) located in respective tunnels (B1, B2) in the side walls of the slide (B), each said spring abutting at it... | 06/10/1986 |
| 4573394 | Machine gun With an automatic or semi-automatic weapon or gun, an improved component coupling arrangement for providing interlocking component assemblies of the receiver and barrel groups of the weapon, where, with a single screw coupling only in conjunction and inte... | 03/04/1986 |
| 4569270 | Automatic hand firearm The invention concerns an automatic, mass-obturated hand firearm comprising a body (1) with handle (2), a barrel (3) joined to the body, a breech block (4) with guide (5) constituted by the body and with cocking and firing mechanism (7), the guide of the ... | 02/11/1986 |
| 4553469 | Low-recoil firearm with noncircular guide rod for angularly locating bolt carrier assembly A locked breach, gas operated long action firearm capable of firing heavy caliber shotgun or rifle shells with substantially reduced recoil. The gas piston and bolt carrier assembly are supported for recoil movement along a single guide rod which extends ... | 11/19/1985 |
| 4502367 | Firearms bolt carrier assembly A bolt carrier assembly has a housing (300) for supporting a bolt (317) and a P cross-sectionally shaped member (301) having the longer side of the P-shape secured to the housing, the P-shaped member being forwardly extended with respect to the bolt. The ... | 03/05/1985 |
| 4497239 | Muzzle ejecting sabot cartridge firearm system A muzzle ejecting sabot cartridge firearm system for use in a weapon having an elongated gun barrel, an action mechanism, and an elongated bolt mounted within the bore of the action mechanism. The bore of the action mechanism and the bore of the gun barre... | 02/05/1985 |
| 4475438 | Gas operated, automatic or semi-automatic guns A gas operated gun having a receiver (1) including a rear wall (100) at one end and a barrel (10) at the other end and a bolt carrier assembly (3) reciprocal within the receiver is arranged to co-operate with a main drive spring (307) that urges the bolt ... | 10/09/1984 |
| 4358986 | Rifle bolt assemblies A rifle having a body comprised of hingedly interconnected lower and upper receivers, a trigger and hammer assembly mounted in the lower receiver, a barrel extending from one end of the upper receiver, an integrated bolt assembly removably mounted in the ... | 11/16/1982 |
| 4311082 | General purpose automatic weapon system There is disclosed a gas operated, fully automatic weapon system with a d feed mechanism having a long recoil, soft cycle operation. The automatic weapon system consists of six groups or sub-assemblies. These are the backplate (rear end cap/fire control ... | 01/19/1982 |
| 4269109 | Open-framework receiver automatic cannon An open-framework receiver automatic cannon comprises a cannon barrel and a breech ring mounting the barrel and through opposite sides of which intermediate regions of first and second elongate rigid tubular support members are received, with longitudinal... | 05/26/1981 |
| 4201113 | Telescoping return-spring assembly for automatic handguns A return-spring assembly for slide-type automatic pistols in which an inner spring and an outer spring are coupled together so that they work in tandem.... | 05/06/1980 |
