Abstract: An automatic firearm breech mechanism is provided that ensures that the delaying roller remains an integral part of the breech mechanism after removing the breech mechanism from the firearm. The automatic firearm breech mechanism may include a breech, a breech carrier, and a delaying roller that is positioned between a rear vertical wall of the breech and a front vertical wall of the breech carrier. The delaying roller may move vertically while between the rear vertical wall of the breech and the front vertical wall of the breech carrier. A modified cage may surround the working area of the delaying roller. The cage may be a strip bent into the shape of an inverted letter “U,” featuring an opening located on its horizontal wall, while its vertical walls are fitted with a slide stop at both ends.

Abstract: A firearm magazine is provided that includes metal feed lips and a plastic body. In the upper part of the cavity of the plastic body of the magazine, a shoulder is included in which the metal feed lips are located. At least one vertical groove may be included on one of the walls of the shoulder of the plastic body. The metal feed lips are attached to the plastic body, potentially by at least one opening and by at least one corresponding projection, which may be formed on the adjacent walls of the plastic body and the feed lips.

Abstract: A firearm frame locking system locks a two-part firearm frame. This is achieved by a firearm frame locking system that includes an upper frame and a lower frame that slide into each other by means of projections that fit into grooves in both the upper frame and the lower frame. In the lower frame, a double-arm lever is located along the longitudinal axis of the firearm. One arm of the double-arm lever extends at least partially into/through a vertical hole in a horizontal rib of the lower frame. A second arm of the double-arm lever ends in the opposite position to a projection in the upper frame. A spring is placed between the horizontal arm and the rib.

Abstract: The purpose of the invention is to ensure that the delaying roller remains an integral part of the breech mechanism after removing the breech mechanism from the fire arm. The automatic firearm breech mechanism featuring a breech (3), a breech carrier (4) and a delaying roller (2) that is positioned between the rear vertical wall (32) of the breech (3) and the front vertical wall (41) of the breech carrier (4), moving vertically, while between the rear vertical wall (32) of the breech (3) and the front vertical wall (41) of the breech carrier (4) a modified cage (8) surrounding the delaying roller's (2) working area is placed. The cage (8) created from a strip bent into the shape of the reversed letter U, featuring an opening (82) located on its horizontal wall (81), while its vertical walls (83) are fitted with a slide stop (84) at both ends.

Abstract: A firearm magazine is provided that includes metal feed lips and a plastic body. In the upper part of the cavity of the plastic body of the magazine, a shoulder is included in which the metal feed lips are located. At least one vertical groove may be included on one of the walls of the shoulder of the plastic body. The metal feed lips are attached to the plastic body, potentially by at least one opening and by at least one corresponding projection, which may be formed on the adjacent walls of the plastic body and the feed lips.

Abstract: A firearm frame locking system may lock a two-part firearm frame. The firearm frame locking system may accelerate the disassembly and reassembly of the firearm and to exclude the possibility of losing the locking mechanism during firearm disassembly. This may be achieved by a firearm frame locking system that includes an upper frame and a lower frame that slide into each other by means of projections that fit into grooves in both the upper frame and the lower frame. In the lower frame, a double-arm lever may be located along the longitudinal axis of the firearm. One arm of the double-arm lever may end into a vertical hole in a horizontal rib of the lower frame. A second arm of the double-arm lever may end in the opposite position to a projection in the upper frame. A spring may be placed between the horizontal arm and the rib.