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| Number | Title | Issue Date |
| 7299737 | Method and apparatus for an action system for a firearm A method and apparatus providing an action system for a firearm. The action system includes a primary roller-lock mechanism located rearward of an ejection port. The primary roller-lock mechanism includes a bolt and a first primary roller caged within the bolt. A bo... | 11/27/2007 |
| 7234260 | Counting device Device (12) for counting shots fired by an automatic firearm (11), having a cartridge chamber containing a cartridge that can be expelled through an expulsion window and a first emission means that emits a continuous electromagnetic signal in such a ma... | 06/26/2007 |
| 7107715 | Bolt assembly with locking system A locking system for firearms including a locking ring rotatably mounted to a bolt. As the bolt is moved through a bolt slide, the locking ring engages a cam member, which causes the locking ring to rotate about the bolt, which can remain fixed against rotation.... | 09/19/2006 |
| 6715399 | Firearm bolt assembly A firearm includes a moveable bolt assembly that absorbs energy associated with the discharge of the firearm. An energy absorbing mechanism within the bolt assembly may include a dampening spring that provides recoil energy dissipation. With this arrangement, one or... | 04/06/2004 |
| 6276256 | Breechblock for barrel weapons Breechblock for barrel weapons, having a breechblock head which is guided in a breechblock guide and, by means of a control element which can be moved to and fro in a straight line and has control ramps, can be brought out of a loading position into a loc... | 08/21/2001 |
| 6079138 | Folded delay blowback operating system for automatic hand held firing weaponry An automatic firing system with military applications, that uses the existing state of the art delayed blowback locking mechanism dating from the 1940's. The difference is that the mechanism is located above and in front of the bolt rather than behind the... | 06/27/2000 |
| 5983774 | Machine gun A gas-operated firearm having a novel bolt construction that includes a locking roller that delays momentarily the action of the bolt upon the firing of the firearm, such delay permitting the bullet to exit the barrel before the bolt can move. The delay i... | 11/16/1999 |
| 5913262 | Breech for barrel-type firearms Breech for barrel-type firearms with a breech block head guided in a breech block support moveable from a loading position into a breech position, wherein the breech block head is provided with locking protrusions (5) corresponding with recesses (4) in th... | 06/15/1999 |
| 5900576 | Semi-rigid locking system for a firearm A semi-rigid locking system for a firearm is described. The locking mechanism has a breech block which is locked with the stock and which can be released by a spring-biased control member. The breech block has at least one bore which receives a locking el... | 05/04/1999 |
| 5682007 | Self-regulating linear inertial guidance breech-lock release and cycling mechanism for repeating firearms A breech bolt lock-up device for a firearm absorbs linear inertial forces and utilizes the absorbed inertial force to linearly cycle the firearm. The lock-up device includes an inner lock sleeve and an outer lock sleeve. A locking device will releasably l... | 10/28/1997 |
| 5447092 | Radial ball lock-up device A lock-up device for a firearm which utilizes a ball and cam arrangement to interlock two members. The interlocked members include ball engagement surfaces which are curved so that a substantial portion of the ball surface is in contact with the engagemen... | 09/05/1995 |
| 4580484 | Firearm and firearm conversion unit A unit is disclosed for use in converting a blowback autoloading pistol, such as a U.S. caliber .45 model 1911, into a gas operated one with the unit being adapted for connection to the receiver of the blowback pistol after its barrel and slide are remove... | 04/08/1986 |
| 4232583 | Firearm with recoil movement delaying mechanism Automatic or semiautomatic firearms which operate on the blowback principle are equipped to fire more powerful cartridges by the provision of a simple lightweight mechanical recoil movement delaying mechanism which increases the breech opening delay time ... | 11/11/1980 |
| 4213261 | Breech locking mechanism A firearm breech locking mechanism which includes a receiver having a longitudinal track guiding an actuating rod in reciprocating motion, and two guide slots for guiding a bolt carrier member mechanically coupled to the operating rod. Two roller receivin... | 07/22/1980 |