A last round hold open (LRHO) apparatus comprising a first lever having a first end and a second end, a mag stop component to which the first lever is pivotally affixed at the second end, a second lever disposed proximate the second end of the first lever, the second lever pivotally affixed to the mag stop, a bolt catch affixed to the mag stop and the second lever, and a magazine release extending from the first end of the first lever.

A firearm has a first side, a second side, a forward section with a barrel, and a rearward section with a stock. The firearm has a central section with an actuation button on the first side and a bolt catch and bolt catch linkage on the second side. A magazine and magazine release are between the actuation button and the bolt catch linkage. An actuation pin extends through the central section from the actuation button to both the bolt catch linkage and the magazine release. A coil spring urges the actuation button outwardly to an inoperative extended orientation. The actuation button is adapted to be depressed for both releasing the magazine and engaging the bolt catch.

A firearm has a first side, a second side, a forward section with a barrel, and a rearward section with a stock. The firearm has a central section with an actuation button on the first side and a bolt catch and bolt catch linkage on the second side. A magazine and magazine release are between the actuation button and the bolt catch linkage. An actuation pin extends through the central section from the actuation button to both the bolt catch linkage and the magazine release. A coil spring urges the actuation button outwardly to an inoperative extended orientation. The actuation button is adapted to be depressed for both releasing the magazine and engaging the bolt catch.

An automatic magazine ejection system is disclosed. The automatic magazine ejection system comprises a modified bolt catch, a release switch, and a pivotable magazine catch. The modified bolt catch pivots from a first position to a second position. When in the second position the bottom of an external part of the modified bolt catch moves toward the firearm. The release switch is connected to the modified bolt catch. The bottom of the release switch engages the end of the pivotable magazine catch to pivot the end of the magazine catch out of the magazine well and permit the automatic removal of the magazine. If the release switch is slid to an off position then the bottom of the release switch does not engage the pivotable magazine catch when it moves and the magazine is not removed from the magazine well.

An intrinsically safe firearm may include a handle and a frame connected by a pivot pin. One or more latches of the firearm can temporarily fix the firearm in a stowed orientation or a deployed orientation. In the deployed orientation, a magazine of the firearm can be removed from the handle; a slide of the firearm can be removed from the frame; a magazine safety allows a firing pin to strike a primer of a round in the firearm; and a trigger of the firearm is accessible to discharge the round in the firearm. In the stowed orientation, the magazine is not removable from the handle; the slide is not removable from the frame; the magazine safety prevents the firing pin from striking the primer; and the trigger of the firearm is not accessible.

The present invention discloses enhancements for a follower within a magazine for an automatic rifle. The disclosed follower contains mechanisms that will (i) disengage the magazine from the automatic rifle once the last round has been removed from the magazine; (ii) minimize the amount of friction between the follower and the inner wall of the magazine; and (iii) detect if the automatic rifle has been breeched prior to disengaging the magazine from the automatic rifle. The disclosure also provides for a takedown pin that will have selectable positions to allow for a full breech, partial breech, and a normal firing mode.

A bolt hold open assembly for a rotary magazine may include a bolt hold open lever movable to a locked position to inhibit forward motion of the bolt after firing the last round of ammunition. The bolt hold open lever may be moved to the locked position by a bolt hold open riser that is activated by a paddle movable with the rotor assembly of the rotary magazine.

A bolt hold open assembly for a rotary magazine may include a bolt hold open lever movable to a locked position to inhibit forward motion of the bolt after firing the last round of ammunition. The bolt hold open lever may be moved to the locked position by a bolt hold open riser that is activated by a paddle movable with the rotor assembly of the rotary magazine.

The present invention is for a rear takedown pin and a bolt catch for use in a firearm such as an AR-15. The rear takedown pin has an elongated recess, a track, a slot, and a spring along an elongated cylindrical body that allows an upper and lower receiver of a firearm, such as an AR-15, to disengage, while the pin remains in the upper and lower receiver holes, thereby allowing a user to quickly replace a magazine without the barrel of the firearm rotating away from the preset aimed position. The invention also includes a bolt catch that allows a user to toggle a release to keep a bolt in its open opinion as well as provides a retractable pin that complies with magazine release lock regulations so a user can quickly replace a spent magazine.

The present invention is for a rear takedown pin and a bolt catch for use in a firearm such as an AR-15. The rear takedown pin has an elongated recess, a track, a slot, and a spring along an elongated cylindrical body that allows an upper and lower receiver of a firearm, such as an AR-15, to disengage, while the pin remains in the upper and lower receiver holes, thereby allowing a user to quickly replace a magazine without the barrel of the firearm rotating away from the preset aimed position. The invention also includes a bolt catch that allows a user to toggle a release to keep a bolt in its open opinion as well as provides a retractable pin that complies with magazine release lock regulations so a user can quickly replace a spent magazine.