 The barrel ends at the base of the front sight, which prevents the use of any sort of muzzle device.The Stechkin APS made a comeback in the late 1970s, when Russian Spetsnaz special forces units in Afghanistan used the suppressor-equipped APB variant for clandestine missions in enemy territory, such as during the Soviet–Afghan War.The 9 mm Parabellum Micro Uzi is a scaled-down version of the Uzi submachine gun, first introduced in 1983.