Connection for connecting an upper receiver (2) to a lower receiver (3) of a weapon (1), which connection comprises front and rear take-down pins (4, 5), and through- holes formed in both receivers for inserting the take-down pins through these holes to connect the upper and lower receiver to each other, wherein the rear take-down pin (5) comprises an eccentric portion (10) at its length for tightening the receivers (2, 3) against each other by turning the rear take-down pin.
The invention relates to a firearm (100) comprising a barrel (101) comprising a gas opening, and a gas system (10), which gas system (10) comprises a gas block (11), a gas piston (12), a force transmitter assembly (13), an indexing part (21) and an indexing counterpart (22), gas openings (18). The gas block (11) is fixedly attached to the barrel and the gas piston (12) is positioned by the indexing part (21;22). In the gas system (10) gas is configured to pass through the gas opening of the barrel (101) via the gas openings (18) of the gas system into the gas block (11) and to set the gas piston (12) to movement. In the gas system (10) the gas piston (12) during its movement backwards is configured to close the gas opening of the barrel (101) for a defined time period and the gas piston (12) is not transmitting power/energy from combustion gas to the force transmitter assembly (13) unless the gas opening/-s (18) is/are closed.
F41A 5/20 - Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated using a gas piston arranged concentrically around the barrel
F41A 5/26 - Arrangements or systems for bleeding the gas from the barrel
The invention relates to a firing pin safety of a firearm, which firearm (100) comprises a firing pin safety (10), a hammer (17), a bolt (18), a bolt carrier (12) and a firing pin (15), in which the firing pin safety (10) comprises a safety lever (11) mounted on a bolt carrier (12) of the firearm, which firing pin safety (10) is configured to control movement of a firing pin (15) of the firearm. The safety lever (11) and the hammer (17) are integrated functionally, the safety lever (11) is turnable and has three main positions: a basic position, in which position the safety lever (11) retains movement of the firing pin (15) to a primer of a cartridge and from inside the bolt (18), a release position, in which the safety lever (11) actuated by the hammer (17) releases movement of the firing pin (15) towards the primer of the cartridge but not from inside the bolt (18), and a dismantle position, in which position the safety lever (11) of the firing pin safety (10) can be dismantled and the firing pin (15) can be removed manually from inside the bolt (18) of the firearm (100) without tools.
F41A 11/00 - Assembly or disassembly features; Modular concepts; Articulated or collapsible guns
F41A 17/66 - Firing-pin safeties, i.e. means for preventing movement of slidably-mounted strikers automatically operated, i.e. operated by breech opening or closing movement
Buffer retainer (5), which buffer retainer comprises a body portion (6) having an upper surface, and a retainer tab (7) extending from the upper surface of the body portion, wherein the cross-sectional area of the retainer tab is smaller than the cross-sectional area of the body portion, wherein the body portion is configured to be set in a hole (14) formed in a frame piece (4) of a weapon (1), and wherein the retainer tab (7) is configured to extend above surface (4a) of the frame piece (4) via a channel (15) to restrict movement of a buffer (9) of the weapon (1), which channel extends between the end surface of the hole (14) and the said surface of the frame piece, and which channel has smaller diameter than the said hole. The invention also relates to a buffer retainer system utilizing such a buffer retainer (5).
The invention relates to a magazine catch body of a firearm, which firearm (100) comprises a magazine (50) and a magazine catch body (10). The magazine catch body (10) comprises a magazine catch button extended left (20), a magazine catch button extended right (25) and a magazine catch shaft (17) configured to connect the magazine catch button extended left (20) and the magazine catch button extended right (25) to each other. The magazine catch body (10) further comprises a magazine catch lever (12) connected to the magazine catch shaft (17) and configured to transmit locking and releasing movements of the magazine catch button extended left (20) and the magazine catch button extended right (25) to the magazine (50) of firearm to lock and to release the magazine (50) to the firearm (100), correspondingly. The magazine catch body further comprises a spring (15) located around the shaft (17) a spring (15) is located. The magazine catch button extended right (25) and the magazine catch button extended left (20) are substantially symmetrically located in respect of the firearm (100). The magazine catch button extended left (20) and the magazine catch button extended right (25) are configured to form the magazine catch body (10) to one structural unity and functionable as one mechanism and the magazine catch button extended left (20) of the magazine catch body (10) comprises a necked part (22) and a widened part (23) and in the necked part (22) an opening (21) is located for a pin (14) configured to form a turning axis of the magazine catch button extended left (20). The necked part (22) of the magazine catch button extended left (20) is configured to press against the lower receiver (55) of the firearm (100) and to receive draw of the spring (15) causing a holding force.
The invention relates to a firing pin safety of a bolt of a firearm, in which the bolt (10) comprises a bolt carrier (32), a firing pin (15) and a bolt body (22), in which the bolt body (22) is located in a bolt body channel (33) formed to the bolt carrier (32) as a central opening in longitudinal direction of the bolt carrier (32), in which a cam pin (34) is provided for turning movement the bolt body (22), in which the firing pin (15) is located in a firing pin channel (23) formed to the bolt body (22) as a central opening in longitudinal direction of the bolt body (22), and in which in the firing pin channel (23) around the firing pin (15) a spring (17) is located for keeping the firing pin (15) in back position and for slowing down movement of the firing pin (15). The bolt (10) comprises an automatic firing pin safety provided by a safety element (25) located in between guides (35) at each side of the bolt carrier (32) setting the position of the safety element (25).
F41A 17/66 - Firing-pin safeties, i.e. means for preventing movement of slidably-mounted strikers automatically operated, i.e. operated by breech opening or closing movement
F41A 3/26 - Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt
7.
A METHOD AND A SYSTEM FOR INCREASING AIMING ACCURACY OF A SNIPER RIFLE
The invention relates to an aiming method, aiming system (10) and computer program product utilized in the aiming method where also a real-time bullet velocity (31) of a fired shot by a sniper rifle is utilized. The bullet velocity is measured in a suppressor (3) in real-time for each fired shot. The suppressor (3) sends the measured bullet velocity to a data logger (6) of the sniper rifle (1). The data logger (6) updates a bullet trajectory to a target after each fired shot and on the bases of an updated bullet trajectory the data logger (6) sends new reticle setting to an optical scope (2) connected to the sniper rifle (1).
A firearm (1) which is arranged modifiable by the user such that a firearm barrel (30) is arranged replaceable by the user, whereby the firearm (1) comprises - a barrel unit (3), which is arranged detachable by the user and fastenable to a receiver (20), which barrel unit (3) comprises the barrel (30) and a locking piece (35), - whereby the locking piece (35) is composed to comprise an external shape, which comprises a backward narrowing rear cone (355), which fits a cone (205) in the receiver (20) and which external shape comprises a forward narrowing front cone (356), and which fits a cone (366) in the centering bush (36), - whereby to the centering bush (36) is rotatably connected a clamping bush (37) having an outer thread (372) which fits an inner thread (202) in the receiver, - whereby by rotating the clamping bush (37) in the locked direction, the rear end of the locking piece (35) is centerable by means of the rear cone (355) and lockable to the cone (205) in the receiver (20) and the locking piece (35) is of its front end centerable by means of the front cone (356) and lockable by means of the cone (366) of the centering bush (36) and a radially expanding cylinder surface (367) cocentrically to a cylinder surface in the surface (207) in the receiver, - whereby, in the tensioned state, the barrel unit (3) is in contact with the receiver (20) only of the locking piece (35) at the point of the rear cone (355) and at the point of the front cone (356).
patents
