Abstract: A replacement buttstock includes a stock body and a locking lever assembly. The stock body has an elongated receiving chamber for receiving a connecting extension of a rifle. The locking lever assembly includes a lever element, a locking pin, a stopper element and a restoring element. The stopper element is operated to allow the lever element to move to an unlock state in which the locking pin is driven to move out of the receiving chamber for unlocking the connecting extension, so that the buttstock is convenient and easy to be quickly assembled with and detached from the rifle while the user does not have to change his or her original aiming gesture.

Abstract: A replacement buttstock includes a stock body and a locking lever assembly. The stock body has an elongated receiving chamber for receiving a connecting extension of a rifle. The locking lever assembly includes a lever element, a locking pin, a stopper element and a restoring element. The stopper element is operated to allow the lever element to move to an unlock state in which the locking pin is driven to move out of the receiving chamber for unlocking the connecting extension, so that the buttstock is convenient and easy to be quickly assembled with and detached from the rifle while the user does not have to change his or her original aiming gesture.

Abstract: A buffer assembly includes a stopper supported at a rear end of an extension tube of a firearm, a buffer slidably supported at a front end of the extension tube, and a coil spring. The coil spring has an outer diameter slightly smaller than an inner diameter of the extension tube to maximize a diameter size of the coil spring. The coil spring has a front end coupled at a front end of the buffer and a rear end coupled at a rear end of the stopper to maximize a length of the coil spring. The buffer is slid within the extension tube in a linear manner that the coil spring urges the buffer at the forwardmost position of the extension tube. When the buffer is pushed rearweadly in a linear slidable manner to compress the coil spring, the coil spring pushes the buffer back to its initial position.

Abstract: A universal mounting device for a pistol having a rear extended connecting extension, wherein the universal mounting device includes a buttstock body having an elongated holding channel for slidably receiving the connecting extension therealong, and a locking mechanism provided at the buttstock body to selectively adjust a diameter size of the holding channel. The locking mechanism is actuated to reduce the diameter size of the holding channel for tightly pressing an inner wall of the holding channel at an outer wall of the connecting extension so as to lock up the connecting extension at the holding channel.