P-64 is a 9x18mm Makarov pistol of Polish origin. It was the standard sidearm in the Polish Armed Forces from 1965 to 1983, and is one of the smallest 9x18mm pistols available. Despite its similarity to the Walther PP, the P-64 is an original design, holding a Polish patent, number 54822. The patent applies to the unique disconnector, shaped like an elongated plate sliding vertically inside the pistol's frame, which performs the following functions: provides an internal safety, decocks the hammer when the safety is engaged, interrupts the weapon's cycle after every shot fired and allows the weapon to be reloaded with the safety on.