FIELD: weapons.
SUBSTANCE: invention relates to return mechanisms of small arms. Return mechanism comprises a bolt carrier, a tubular piston rod of the breech frame, on the walls of which there are through holes, a detachable piston, a fixed rod of a return spring with a ball limiter, a thrust washer, elements of a barrel compression spring, heel to fix fixed rod of return spring on barrel receiver, screw fixed rod locating pin with heel. Compression spring of return mechanism is made in form of conical accordion of separate elements of barrel-shaped springs, in the compressed state coils of which are laid in one plane one inside the other, and the turns of the whole spring during compression are laid in the horizontal and vertical planes in two, three and more rows.
EFFECT: technical result is simplification of design with preservation of reliability of operation of return mechanism, increased service life of weapon, reduced weight, serviceability at clogging of mechanism.
4 cl, 9 dwg
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