For use on a firearm having a removable ammunition magazine, a longitudinally reciprocating bolt, and a pivoting bolt catch member, the present invention provides an empty ammunition magazine bolt hold open mechanism having a longitudinally extending axel pivotally mounted to the firearm for rotation about a longitudinal axis. The axel has a forward lever arm that extends transversely from the axis and is positioned to be engaged by a magazine follower when the magazine is empty of ammunition. Displacement of the forward lever arm causes rotation of the axel. The axel has a rear portion configured to engage the bolt catch and cause pivotal movement of the bolt catch member when the axel is rotated.

For use on a firearm having a removable ammunition magazine, a longitudinally reciprocating bolt, and a pivoting bolt catch member, the present invention provides an empty ammunition magazine bolt hold open mechanism having a longitudinally extending axel pivotally mounted to the firearm for rotation about a longitudinal axis. The axel has a forward lever arm that extends transversely from the axis and is positioned to be engaged by a magazine follower when the magazine is empty of ammunition. Displacement of the forward lever arm causes rotation of the axel. The axel has a rear portion configured to engage the bolt catch and cause pivotal movement of the bolt catch member when the axel is rotated.

For use on a firearm having a removable ammunition magazine, a longitudinally reciprocating bolt, and a pivoting bolt catch member, the present invention provides an empty ammunition magazine bolt hold open mechanism having a longitudinally extending axel pivotally mounted to the firearm for rotation about a longitudinal axis. The axel has a forward lever arm that extends transversely from the axis and is positioned to be engaged by a magazine follower when the magazine is empty of ammunition. Displacement of the forward lever arm causes rotation of the axel. The axel has a rear portion configured to engage the bolt catch and cause pivotal movement of the bolt catch member when the axel is rotated.

The present disclosure relates to an automatic or semiautomatic pistol including a slide and a magazine. The magazine feeder includes an actuator that controls a slide stop. The slide stop, located rearward of the magazine, is designed to switch from a low to a high position. In its high position, the slide stop locks the slide in a rearward position. The pistol also includes a control lever for the slide stop, which is attached at one end to rotate about a pin forward of the magazine. The control lever includes a feeler that is lifted by the control actuator when the magazine is empty, causing the slide stop to switch from its low to high position. The slide stop may have ambidextrous manual releases rigidly connected to each other across the pistol.

The present disclosure relates to an automatic or semiautomatic pistol including a slide and a magazine. The magazine feeder includes an actuator that controls a slide stop. The slide stop, located rearward of the magazine, is designed to switch from a low to a high position. In its high position, the slide stop locks the slide in a rearward position. The pistol also includes a control lever for the slide stop, which is attached at one end to rotate about a pin forward of the magazine. The control lever includes a feeler that is lifted by the control actuator when the magazine is empty, causing the slide stop to switch from its low to high position. The slide stop may have ambidextrous manual releases rigidly connected to each other across the pistol.