LIGHT WEAPONS BREECH BLOCK (VERSIONS) Russian patent published in 2017 - IPC F41A3/40 

FIELD: weaponry and ammunition supplies.

SUBSTANCE: light weapons breech block comprises a bolt carrier, a slide with a double-lever pivoted arm fixed in it and a block stop. The double-lever arm locking end operating surface is implemented in a double-lever arm cylindrical pivot core and corresponds to spun radial surface area, the radius of which is equal to a cylindrical stop radius. The double-lever arm trunnion is placed on the surface of the attachment line when dealing with the cylindrical stop or the trunnion removed into the cylindrical stop core in such a way that the arm trunnion to cylindrical stop axial axis distance is a value that is equal to or below cylindrical stop radius. Due to the first version, the device is different in that the cylindrical stop has an opportunity to shift parallel to its axial axis. Due to the second version, the device is different in that the double-lever arm cylindrical pivot has an opportunity to shift parallel to its axial axis slide slot.

EFFECT: breech block components wear reduction.

8 cl, 53 dwg