A modular trigger assembly having auto-tensioning hammer pin and trigger pins, which allow for rapid installation and removal of the modular trigger assembly from the lower receiver of an ArmaLite style modular rifle using minimal tools. When installed and under tension, the auto-tensioning pins remain flush with the exterior of the lower receiver and present no external parts outside of the lower receiver while maintaining anti-walk and anti-roll properties.

A modular trigger assembly having auto-tensioning hammer pin and trigger pins, which allow for rapid installation and removal of the modular trigger assembly from the lower receiver of an ArmaLite style modular rifle using minimal tools. When installed and under tension, the auto-tensioning pins remain flush with the exterior of the lower receiver and present no external parts outside of the lower receiver while maintaining anti-walk and anti-roll properties.

An automatic or semi-automatic firearm including a trigger having a frame, at least one trigger sear extending from the frame, and a hammer having a hammer pivot axis, a head and at least one hammer sear disposed on a lateral side of the hammer between the hammer pivot axis and the head, wherein the frame includes a pivot axis and the at least one trigger sear includes a trigger sear surface, the at least one trigger sear extending from the frame such that the at least one trigger sear engages a corresponding one of the at least one hammer sear.

An automatic or semi-automatic firearm including a trigger having a frame, at least one trigger sear extending from the frame, and a hammer having a hammer pivot axis, a head and at least one hammer sear disposed on a lateral side of the hammer between the hammer pivot axis and the head, wherein the frame includes a pivot axis and the at least one trigger sear includes a trigger sear surface, the at least one trigger sear extending from the frame such that the at least one trigger sear engages a corresponding one of the at least one hammer sear.

A trigger emulation mechanism of an electric gun is disclosed. When actuated, a trigger assembly causes a retainer assembly to drive the toothed rack element to allow the toothed rack element to operate in combination with a gear shaft assembly to amplify a rotational angle, making the gear shaft assembly drive a striker hammer plate to rotate and allowing the striker hammer plate to drive the striker hammer elastic element to accumulate energy therein. Afterward, the retainer assembly may release the toothed rack element, causing the striker hammer elastic element to force the striker hammer plate to rotate in an opposite direction to strike thus generate sound and vibration, thereby achieving advantages of enhancing the degree of simulation by generating sound and vibration and an idle stroke before firing is initiated and also reducing the size thereof for applications to various models of electric guns.

A trigger emulation mechanism of an electric gun is disclosed. When actuated, a trigger assembly causes a retainer assembly to drive the toothed rack element to allow the toothed rack element to operate in combination with a gear shaft assembly to amplify a rotational angle, making the gear shaft assembly drive a striker hammer plate to rotate and allowing the striker hammer plate to drive the striker hammer elastic element to accumulate energy therein. Afterward, the retainer assembly may release the toothed rack element, causing the striker hammer elastic element to force the striker hammer plate to rotate in an opposite direction to strike thus generate sound and vibration, thereby achieving advantages of enhancing the degree of simulation by generating sound and vibration and an idle stroke before firing is initiated and also reducing the size thereof for applications to various models of electric guns.

A compact firearm has a first frame portion including a barrel defining a barrel axis, a second frame portion including a firing mechanism configured to discharge a cartridge residing in a chamber of the barrel, the second frame portion pivotally connected to the first frame portion to pivot about a pivot axis offset from and parallel to the barrel axis, the first frame portion defining a first mating feature formed as a first surface of revolution about the pivot axis, the second frame portion defining a second mating feature formed as a second surface of revolution about the pivot axis, and the first and second mating features mating closely with each other to prevent relative movement between the first and second frame portions except in relative rotation about the pivot axis. The first and second mating features may be dovetail elements.

A compact firearm has a first frame portion including a barrel defining a barrel axis, a second frame portion including a firing mechanism configured to discharge a cartridge residing in a chamber of the barrel, the second frame portion pivotally connected to the first frame portion to pivot about a pivot axis offset from and parallel to the barrel axis, the first frame portion defining a first mating feature formed as a first surface of revolution about the pivot axis, the second frame portion defining a second mating feature formed as a second surface of revolution about the pivot axis, and the first and second mating features mating closely with each other to prevent relative movement between the first and second frame portions except in relative rotation about the pivot axis. The first and second mating features may be dovetail elements.

A lower receiver has a trigger assembly. An upper receiver is coupled to the lower receiver. The lower receiver has a bolt assembly and an L-shaped slot. The L-shaped slot has a long leg, a junction, and a short leg. The bolt assembly interacts with the L-shaped slot. The upper receiver has a rear end to which a compressed gas power source can be coupled. The upper receiver has a gas path from the compressed gas power source for firing a projectile through a barrel and for cocking the bolt assembly. The gas path is entirely contained by the upper receiver.

A trigger reset that is disposed in a firearm handle including an electric motor, a battery, a gear box and cam lobe mounted on a shaft of the motor. A reset bar assembly is secured to the cam lobe. As shaft turns, cam lobe moves to provide a reciprocating motion to reset bar assembly. The reset bar assembly may be biased in lateral directions via a spring or the like. Rearward movement of the firearm trigger causes movement of the reset bar assembly in a rearward longitudinal direction. When the trigger reset is actuated, the motor rotates the cam lobe moving the reset bar assembly in a forward position thereby urging the trigger to a reset position prior to actuating the next firing sequence. The reset trigger system further includes a switch defining a face portion that is positioned on the exterior surface of the grip and immediately below the trigger for easy accessibility when holding or firing the firearm.