FIREARM Russian patent published in 2000 - IPC

FIELD: small arms, applicable both for fire with live ammunition and for practice fire with easily deformable bullets, as well as for exerting psychologic and physiological effects upon transgressors. SUBSTANCE: firearm has a frame, cartridge feed mechanism, reloading mechanism, trigger mechanism, standard barrel and an additional barrel aligned with the standard barrel, but outside its bore. The fasteners of the additional barrel are made in the form of a housing with an inner cavity and two inner threaded sections, and through slots are made in the middle part of the housing. The housing is installed on the muzzle section of the standard barrel so that the rear edge of the slots is positioned flush with the muzzle end of the standard barrel. The additional barrel is threaded in the housing for axial movement and measurement of the clearance between the muzzle end of the standard barrel and the end of the flange of the additional barrel, as well as for fixing its position by a lock-nut. EFFECT: provides for conducting fire irrespective of the type of the firearm automatics, and adjusting the muzzle velocity of easily deformable bullet. 4 dwg