Method for determining muzzle velocity of a firearm (2), in which method at least one strain gauge (4) is utilized in the determining, wherein the strain change caused by firing of the firearm (2) is measured at a single point along the barrel (3) of the firearm with the at least one strain gauge (4), and the obtained measurement data is compared with predefined reference values for determining the muzzle velocity. The invention relates also a device (1) for determining muzzle velocity of a firearm (2) and to a firearm equipped with such device.
The invention relates to a firearm suppressor which suppressor (10) has a substantially rotationally symmetrical cylindrical form and comprises a suppressor housing (13), a rear end cap (11), a plurality of chambers (18, 19, 25, 34, 36, 37) for expansion and burning of propellant gases and arranged inside the suppressor housing (13), a barrel opening (30), an outlet opening (20) for a projectile and a continuous channel along an imaginary center axis of the rotationally symmetrical cylindrical form of the suppressor (10) from the barrel opening (30) to the outlet opening (20) for the projectile configured to be fired by the firearm. The suppressor (10) comprises a support frame (12) attached to the suppressor housing (13) by a reopenable support joint (27). The suppressor (10) further comprises the baffles (14, 16, 17) located between the support frame (12) and the front end of the suppressor (10) and the suppressor further comprises form-fitting, reopenable joints (23) to attach the baffles (14, 16, 17) to adjacent baffle/-s thereof. The invention also relates to a firearm comprising a suppressor.
The invention relates to a firearm suppressor, which suppressor (10) has a substantially rotationally symmetrical cylindrical form and comprises a suppressor housing (13), a rear end cap (11), a plurality of chambers (18, 19, 34, 36, 37) for expansion and burning of propellant gases and arranged inside the suppressor housing (13), a barrel opening (30), an outlet opening (20) for a projectile and a continuous channel along an imaginary center axis of the rotationally symmetrical cylindrical form of the suppressor (10) from the barrel opening (30) to the outlet opening (20) for the projectile configured to be fired by the firearm. The suppressor (10) comprises a gas turning and support frame (12). The gas turning and support frame (12) has a deflector surface (12A) configured to turn at least 50 %, advantageously 80 %, of propellant gases substantially backwards, and the gas turning and support frame (12) has an open inner space (12B) configured to provide filling and expansion of the propellant gases.
The invention relates to a firearm suppressor, which suppressor (10) has a substantially rotationally symmetrical cylindrical form and comprises a suppressor housing (13), a rear end cap (11), a plurality of chambers (18, 19, 34, 36, 36A, 36B, 37) for expansion and burning of propellant gases and arranged inside the suppressor housing (13), a barrel opening (30), an outlet opening (20) for a projectile and a continuous channel along an imaginary center axis of the rotationally symmetrical cylindrical form of the suppressor (10) from the barrel opening (30) to the outlet opening (20) for the projectile configured to be fired by the firearm. The suppressor (10) comprises a support frame (12) attached to the suppressor housing (13) by a reopenable support joint (27). The suppressor (10) further comprises the baffles (14, 16, 16A, 16B, 17) located between the support frame (12) and the front end of the suppressor (10) and forming a baffle structure, and the baffle structure comprises at least one adapter baffle (16A) dimensioned such, that the adapter baffle (16A) connects its adjacent baffles (14, 16, 16B, 17) with different dimensions and/or shapes.
Buffer retainer, which buffer retainer comprises a body portion having an upper surface, and a retainer tab 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 formed in a frame piece of a weapon, and wherein the retainer tab is configured to extend above surface of the frame piece via a channel to restrict movement of a buffer of the weapon, which channel extends between the end surface of the hole 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.
A magazine catch body comprising a magazine and a magazine catch body comprising magazine catch buttons extended left and right, a magazine catch shaft connecting the magazine catch buttons to each other, and a magazine catch lever connected to the shaft for transmitting locking-releasing movements of the magazine catch buttons to the magazine to lock and release the magazine to the firearm, is disclosed. The magazine catch body comprises a spring around the shaft. The magazine catch buttons are substantially symmetrically located in respect of the firearm. The magazine catch buttons form the magazine catch body to one structural unity functionable as one mechanism. The magazine catch button extended left comprises a necked part pressing the lower receiver and receiving draw of the spring causing a holding force. In the necked part is an opening for a pin forming a turning axis of the magazine catch button extended left.
Connection for connecting an upper receiver to a lower receiver of a weapon, which connection comprises front and rear take-down pins, 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 comprises an eccentric portion at its length for tightening the receivers against each other by turning the rear take-down pin.
The invention relates to a firearm comprising a barrel comprising a gas opening, and a gas system, which gas system comprises a gas block, a gas piston, a force transmitter assembly, an indexing part and an indexing counterpart, gas openings. The gas block is fixedly attached to the barrel and the gas piston is positioned by the indexing part. In the gas system gas is configured to pass through the gas opening of the barrel via the gas openings of the gas system into the gas block and to set the gas piston to movement. In the gas system the gas piston during its movement backwards is configured to close the gas opening of the barrel for a defined time period and the gas piston is not transmitting power/energy from combustion gas to the force transmitter assembly unless the gas opening/-s is/are closed.
F41A 5/18 - Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
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
The invention relates to a firing pin safety of a firearm, which firearm comprises a firing pin safety, a hammer, a bolt, a bolt carrier, and a firing pin, in which the firing pin safety comprises a safety lever mounted on a bolt carrier of the firearm, which firing pin safety is configured to control movement of a firing pin of the firearm. The safety lever and the hammer are integrated functionally, the safety lever is turnable and has three main positions: a basic position, in which position the safety lever retains movement of the firing pin to a primer of a cartridge and from inside the bolt, a release position, in which the safety lever actuated by the hammer releases movement of the firing pin towards the primer of the cartridge but not from inside the bolt, and a dismantle position, in which position the safety lever of the firing pin safety can be dismantled and the firing pin can be removed manually from inside the bolt of the firearm without tools.
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 11/00 - Assembly or disassembly features; Modular concepts; Articulated or collapsible guns
The invention relates to a bullet, which comprises a bullet body and a bullet tip, which bullet body of the bullet is a solid body bullet body and made of lead-free metal, advantageously of copper, most advantageously extremely pure copper, which bullet tip of the bullet is made of polymer material, advantageously of POM (polyoxymethylene). The bullet body of the bullet comprises an inner central opening with inner grooves located radially spaced apart at the circumference of the inner central opening. The bullet tip of the bullet comprises a tip end part, tip end grooves and a tip end central bridge, and the bullet tip is located in the inner central opening of the bullet body such, that the tip end part of the bullet tip is outside the bullet body.
F42B 12/74 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body
F42B 12/34 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type
11.
CONNECTION FOR CONNECTING UPPER AND LOWER RECEIVER OF A WEAPON
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
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.
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).
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 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
20.
CONNECTION FOR CONNECTING UPPER AND LOWER RECEIVER OF A WEAPON
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 bullet (10), which comprises a bullet body (20) and a bullet tip (30), which bullet body (20) of the bullet (10) is a solid body bullet body and made of lead-free metal, advantageously of copper, most advantageously extremely pure copper, which bullet tip (30) of the bullet (10) is made of polymer material, advantageously of POM (polyoxymethylene). The bullet body (20) of the bullet (10) comprises an inner central opening (22) with inner grooves (21) located radially spaced apart at the circumference of the inner central opening (22). The bullet tip (30) of the bullet (10) comprises a tip end part (35), tip end grooves (31) and a tip end central bridge (32), and the bullet tip (30) is located in the inner central opening (22) of the bullet body (20) such, that the tip end part (35) of the bullet tip (30) is outside the bullet body (20).
F42B 12/34 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type
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
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
24.
Method and a system for increasing aiming accuracy of a sniper rifle
The invention relates to an aiming method, aiming system and computer program product utilized in the aiming method where also a real-time bullet velocity of a fired shot by a sniper rifle is utilized. The bullet velocity is measured in a suppressor in real-time for each fired shot. The suppressor sends the measured bullet velocity to a data logger of the sniper rifle. The data logger updates a bullet trajectory to a target after each fired shot and on the bases of an updated bullet trajectory the data logger sends new reticle setting to an optical scope connected to the 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).
The invention relates to a rifle comprising a stock (11) and a grip (12), in which the grip (12) is arranged interchangeable by the user. The grip (12) is attached to the stock (11) of the rifle (20) releasably by fastening means (14, 15, 16) and advantageously by a form-fitting attachment arrangement (17, 18). The in- vention also relates to a rifle system comprising a rifle (10), which rifle (10) comprises a stock and a grip (12). The rifle system comprises at least two grips (12) of different types interchangeable by the user.
A firearm suppressor (1) has a suppressor housing (10) defining the outer surface of the suppressor (1), a mounting member (2) for fastening/detaching the suppressor (1) with a barrel (70) of the firearm (7) and having an aperture (20) for a projectile (8) and propellant gases of the firearm (7) to enter the suppressor (1), an interior arranged to form a number of compartments (30), which are separated by conical baffles (3) having an aperture (32) for the projectile to pass through, an exit aperture (60) for the projectile (8) and the propellant gases to exit the suppressor (1), the compartments (30) formed by the conical baffles (3) are different in volume so that in the order of advancing projectile path (PP) the largest compartment (30) is followed by number of smaller compartments (30).
A firearm suppressor (1) comprising - a suppressor housing (10) defining the outer surface of the suppressor (1), - mounting means (2) for fastening/detaching the suppressor (1) with a barrel (70) of the firearm (7) and having an aperture (20) for a projectile (8) and propellant gases of the firearm (7) to enter the suppressor (1), - an interior arranged to form a number of compartments (30), which are separated by conical baffles (3) having an aperture (32) for the projectile to pass through, - an exit aperture (60) for the projectile (8) and the propellant gases to exit the suppressor (1), - the compartments (30) formed by the conical baffles (3) are different in volume so that in the order of advancing projectile path (PP) the largest compartment (30) is followed by number of smaller compartments (30).
A device (6) for a firearm (7) to control the exhaust of the propellant gas flow from the firearm muzzle (71). The device (6) comprises an exit aperture (60) formed as a flow nozzle having a trailing edge (62) which is formed to comprise a number of V-shaped notches (64). Invention relates also to a firearm suppressor (1) comprising a suppressor housing (10) defining the outer surface of the suppressor (1), an interior arranged to form a number of compartments (30), mounting means (2) for fastening / detaching the suppressor with a barrel (70) of the firearm (7) and having an aperture (2) for a projectile (8) and propellant gases of the firearm (7) to enter to the interior of the suppressor (1), an exit aperture (60) for the projectile (8) and the propellant gases to exit the suppressor (1). The exit aperture (60) is formed as a flow nozzle having a trailing edge (62) which is formed to comprise a number of V-shaped notches (64).
A firearm which is modifiable by the user such that a firearm barrel is arranged replaceable by the user, wherein the firearm comprises a barrel unit, which is detachable by the user and fastenable to a receiver, which barrel unit comprises the barrel and a locking piece, wherein the locking piece has a backward narrowing rear cone, which fits a cone in the receiver and which has a forward narrowing front cone, and which fits a cone in the centering bush, wherein to the centering bush is rotatably connected a clamping bush having an outer thread which fits an inner thread in the receiver, wherein by rotating the clamping bush in the locked direction, the rear end of the locking piece is centerable by means of the rear cone and lockable to the cone in the receiver.
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).
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).
A cartridge magazine for firearms has an elongated channel to receive a plurality of cartridges. The cartridge magazine has a box forming a housing of the cartridge magazine, a spring operated follower for pressing the cartridges in the magazine to an upper position. In this position, the topmost cartridge is ready for feeding into a chamber of the firearm and in this position the topmost cartridge rests against a pair of retaining lips. The lips remain in a first position when the topmost cartridge is in the upper position and the lips are operatively displaceable to a second position wider than the first position.
A stock of a firearm, which can be warmed or cooled, in order to generate a comfortable temperature in designated portions. A warm or cool gunstock helps a shooter or hunter to stay outdoors longer in cold or hot circumstances and enables him or her to perform better triggering of the firearm with a reliable triggering hand. Warming or cooling is done with a separate thermal element, which can be inserted into a firearm.
A cartridge magazine (1) for firearms (3) has an elongated channel to receive a plurality of cartridges (2). The cartridge magazine (1) has a box (12) forming a housing of the cartridge magazine (1), a spring operated follower (13) for pressing the cartridges (2) in the magazine (1) to an upper position. In this position, the topmost cartridge (2) is ready for feeding into a chamber (36) of the firearm (3) and in this position the topmost cartridge (2) rests against a pair of retaining lips (10). The lips (10) remain in a first position when the topmost cartridge (2) is in the upper position and the lips (10) are operatively displaceable to a second position wider than the first position.
A stock (10) for a firearm, provided with a stock frame section (3) and a releasably attachable cheekpiece (1, 2), in which the stock frame section (3) is symmetrical in relation to the longitudinal vertical direction of the stock, and when the cheekpiece (1, 2) is installed to the left side of the stock frame section (3), the stock becomes a right-handed stock, and when the cheekpiece (1, 2) is installed to the right side of the stock frame section (3), the stock becomes a left-handed stock. According to an advantageous embodiment the cheekpiece (1, 2) is adjustable, preferably quick- adjustable in height.
A method and a user interface are described for sighting in a virtual scope (100) of a virtual rifle. The point of the impact (118) of the virtual shot is determined, wherein the point of the impact (118) is based on ballistics (111) of the shot, a calibre (103) of the virtual rifle shooting the virtual shot and on a shooting distance (101) of the virtual shot. The virtual scope (100) is sighted in so that the virtual scope (100) can be sighted in based on the point of the impact (118) of the virtual shot. The virtual scope (100) have a substantial analogy with a real riflescope, thereby making the sighting in of the real scope more convenient.
The invention relates to a recoil pad of a firearm, consisting of a flexible and elastic damping cushion (2), which is attached to the butt of a firearm stock (1) and which rests against the shoulder (3) when shooting. Inside the recoil pad there is a displacement device (4), which in connection with compression creates an upward displacement in the recoil pad.
The invention relates to a lock of a magazine (1) for a firearm, consisting of a locking edge (2) in the magazine (1) and a magazine release (3), which rests on the locking edge and which is retained in the locking position by spring force (4). At the end of the magazine release (3) there is provided a backup cam (5), preventing the magazine release from opening before the magazine (1) is pushed inwards (A) so that the backup cam (5) can pass the locking edge (2) as the magazine release (3) is opened (B) for detaching the magazine.
