A modified trigger assembly for a handgun has a shortened trigger bar with an angled end that engages a connector to form a gap that reduces potential energy between the trigger bar and the connector, such that the connector is inhibited from disengaging from the trigger bar when the trigger is pulled or released. A gap forms between an angled end of the trigger bar and a first end of the connector. The gap and the shortened length of the trigger bar reduce potential energy forces that could disengage the connector from the trigger bar. By remaining engaged with the trigger bar, the connector is prevented from resetting to a natural position; and consequently, the handgun can discharge from both a trigger pull position and a trigger release position. Consequently, a repeated shot occurs when releasing the trigger after a natural triggering movement of pulling a trigger.

A modified trigger assembly for a handgun has a shortened trigger bar with an angled end that engages a connector to form a gap that reduces potential energy between the trigger bar and the connector, such that the connector is inhibited from disengaging from the trigger bar when the trigger is pulled or released. A gap forms between an angled end of the trigger bar and a first end of the connector. The gap and the shortened length of the trigger bar reduce potential energy forces that could disengage the connector from the trigger bar. By remaining engaged with the trigger bar, the connector is prevented from resetting to a natural position; and consequently, the handgun can discharge from both a trigger pull position and a trigger release position. Consequently, a repeated shot occurs when releasing the trigger after a natural triggering movement of pulling a trigger.

An auto-loading firearm having a system for switches between live fire and training modes via a selector switch mounted either on the firearm frame or on a specially designed training attachment. A multi-part transfer bar, between the trigger and sear, can be selectively connected in a live fire mode and spaced apart in a training mode. A selectively engageable trigger resetting mechanism automatically returns the trigger to its set position after firing the firearm is in training mode.

Systems and methods for reducing or removing trigger slack in a firearm are disclosed. In some instances, a method comprises positioning a plunger safety tab to a front end of a body of a trigger bar. The plunger safety is positioned more forward on the body relative to an OEM plunger safety tab. The method also includes positioning a cruciform coupled to the rear end of the body. The cruciform is positioned more forward on the body relative to an OEM cruciform.

A trigger labor-saving structure of a crossbow, the crossbow includes a body, an arcuate limb, and a trigger assembly. The limb is mounted adjacent to a front end of the body and intersects with the body, and the limb includes a bowstring. The trigger assembly includes: a trigger seat arranged on the body, a trigger partially accommodated in the trigger seat and downward extending out of the trigger seat, the trigger having a stop face, and the stop face having a first periphery and a second periphery; a string hook member housed in the trigger seat and including an engagement face corresponding to the stop face; and at least one concave portion formed on the stop face and defined between the first periphery and the second periphery, such that frictional resistance between the stop face and the engagement face reduces.

A trigger labor-saving structure of a crossbow, the crossbow includes a body, an arcuate limb, and a trigger assembly. The limb is mounted adjacent to a front end of the body and intersects with the body, and the limb includes a bowstring. The trigger assembly includes: a trigger seat arranged on the body, a trigger partially accommodated in the trigger seat and downward extending out of the trigger seat, the trigger having a stop face; a string hook member housed in the trigger seat and including an engagement face corresponding to the stop face; and at least one concave portion formed on the engagement face of the string hook member and defined between the first periphery and the second periphery, such that frictional resistance between the stop face and the engagement face reduces.

Trigger groups for semi-automatic firearms have a frame, a hammer connected to the frame and movable between a cocked position and a striking position, the hammer being biased toward the striking position, a trigger element connected to the frame and movable by a user between a forward position and a rearward position, a selector connected to the frame and movable between at least a first position and a second position, and a plurality of retention facilities each operable to selectively restrain the hammer in the cocked position, and when the selector is in the second position to enable discharge of the firearm in response to movement of the trigger to the forward position after movement to the rearward position and to enable an additional discharge of the firearm upon release of the trigger to the forward position.

Trigger groups for semi-automatic firearms have a frame, a hammer connected to the frame and movable between a cocked position and a striking position, the hammer being biased toward the striking position, a trigger element connected to the frame and movable by a user between a forward position and a rearward position, a selector connected to the frame and movable between at least a first position and a second position, and a plurality of retention facilities each operable to selectively restrain the hammer in the cocked position, and when the selector is in the second position to enable discharge of the firearm in response to movement of the trigger to the forward position after movement to the rearward position and to enable an additional discharge of the firearm upon release of the trigger to the forward position.

A cover, or dust cover, for use in a firearm, the firearm being operable for firing a cartridge having a projectile and having a receiver portion including an elongated passageway, a magnetic reciprocatable firing mechanism operable to fire the cartridge, a charging handle connected to the firing mechanism, and a barrel adapted to receive the projectile after the cartridge is fired. The dust cover is adapted for movement and to substantially cover a portion of the passageway. A magnet is connected to the dust cover and is magnetically attracted to the firing mechanism such that the dust cover is drawn towards and substantially follows the firing mechanism as the firing mechanism reciprocates with respect to the receiver upon firing the cartridge, wherein the dust cover intermittently uncovers and covers the portion of the passageway as the firing mechanism reciprocates.

Trigger groups for semi-automatic firearms have a frame, a hammer connected to the frame and movable between a cocked position and a striking position, the hammer being biased toward the striking position, a trigger element connected to the frame and movable by a user between a forward position and a rearward position, a selector connected to the frame and movable between at least a first position and a second position, and a plurality of retention facilities each operable to selectively restrain the hammer in the cocked position, and when the selector is in the second position to enable discharge of the firearm in response to movement of the trigger to the forward position after movement to the rearward position and to enable an additional discharge of the firearm upon release of the trigger to the forward position.