Longitudinally sliding bolt of small arms with a collet clutch mechanism on the barrel

A longitudinally sliding bolt of small arms with a collet clutching mechanism on a barrel,

• wherein the bolt comprises collet clutching petals, a sleeve-like element controlling the collet clutching petals, a striker, a striker spring, a bolt spring having a stop;
• wherein the collet clutching petals are arranged on top of a bolt body and framed by an inertial sleeve having a spacer spring;
• wherein the collet clutching petals are provided in an amount of at least two, fastened with a circular spring shifted to a front side of the bolt from a central part of the collet clutching petals, and have protrusions at both ends which extend away from a bolt axis;
• wherein the spacer spring and the inertial sleeve configured to longitudinally slide along the collet clutching petals are arranged between the protrusions sequentially in a row away from an end of the bolt;
• wherein protrusions extending inwardly to engage with the barrel are provided on an inner side of the collet clutching petals towards the bolt axis in a front part of the collet clutching petals,
• wherein in the central part of the collet clutching petals, there are swing stops providing a lever-type mechanism for clutching and declutching the bolt to and from the barrel;
• wherein protrusions for fixing the collet clutching petals on the bolt are arranged between the swing stops closer to the front part of the collet clutching petals;
• wherein an outer surface of the collet clutching petals has a longitudinal protrusion having gradual bevels and shifted to a rear side of the bolt, the longitudinal protrusion being configured to control a mechanism for clutching and declutching the collet clutching petals on the barrel;
• wherein the longitudinal protrusion on the rear side of the bolt has a ledge configured to temporarily fix the inertial sleeve in a rear position until a front part of the bolt comes into contact with a breech piece of the barrel when the bolt moves forward;
• and
• wherein matching elements configured to fix the swing stops and the protrusions for fixing the collet clutching petals are provided on a surface of the bolt.