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| Number | Title | Issue Date |
| 8074556 | Locking systems for use with firearms Locking systems for use with firearms are described. An example locking system for use with a firearm includes a breechblock carrier and a lock spring mechanism that includes a piston. The breechblock carrier is configured to interaction with the piston. Additionall... | 12/13/2011 |
| 7874240 | Firearm operating mechanisms and methods The present invention is a direct impingement gas operated firearm, having a longitudinally translatable bolt and a rearward locking mechanism coupled to the bolt. The rearward locking mechanism includes a locking lug, laterally shiftable by gas means from a locked ... | 01/25/2011 |
| 7316091 | Firearm bolt carrier with mechanical/gas key A firearm includes a barrel having an end coupled to a receiver. A reciprocating bolt carrier is carried by the receiver and movable between a locked position and an unlocked position. The bolt carrier includes a buttress formed in a top surface thereof. A key inclu... | 01/08/2008 |
| 7040213 | Firearm receiver system with belt-feed capability A firearm receiver system including a receiver body, an ammunition belt feeding assembly and a bolt carrier. The receiver body includes a first face and a second face approximately opposite the first face. The receiver body is configured for having means for trigger... | 05/09/2006 |
| 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 |
| 4246830 | Firing pin A firing pin for a firearm, more particularly for a firearm provided with a gas-operated bolt and bolt-carrier, the firing pin being disposed slidably in a longitudinal bore in the bolt. The firing pin of the invention has its shoulder abutment, which lim... | 01/27/1981 |
| 4123963 | Firearm and caseless ammunition therefor A firearm for firing caseless ammunition includes a barrel, a receiver, a bolt, and a firing pin. The bolt includes laterally open pockets for receiving a projectile and a separate propellant cartridge. The bolt carries an extractor to extract unspent pro... | 11/07/1978 |
| 3985062 | Firearm construction A firearm, particularly a short firearm for firing caseless ammunition, comprises a housing having a sleeve fixed therein with first and second spring members which are biased against a projection on the gun barrel in order to hold it against axial displa... | 10/12/1976 |
