AUTOMATIC PISTOL Russian patent published in 2000 - IPC

FIELD: small arms. SUBSTANCE: proposed automatic pistol has barrel fitted with lateral ring-shaped collar located in area of middle of barrel, return mechanism composed of two springs embracing barrel and interacting with one end with collar of barrel and with opposite end with casing-bolt and m post of frame. Casing-bolt is provided with two longitudinal grooves, frame has template groove. Collar of barrel has template boss placed in template groove of frame and two firing stops located in two longitudinal grooves of casing-bolt ensuring possibility of longitudinal and rotary motion of barrel with reference to its axis. Combined trigger mechanism has cock with tooth-protrusion that provides for cocking of firing spring of firing pin and functions as sear of firing pin under mode of automatic fire. Sear of trigger mechanism is fitted with two teeth, upper and lower, that engage firing tooth of cock with upper firing tooth under mode of single fire and lower tooth under mode of automatic fire correspondingly. EFFECT: increased density of hits, diminished overall dimensions and mass of automatic pistol. 1 cl, 7 dwg