TKB-010
Encyclopedia
The TKB-010 was a Soviet 7.62 x 33 mm fully automatic assault rifle
Assault rifle
An assault rifle is a selective fire rifle that uses an intermediate cartridge and a detachable magazine. Assault rifles are the standard infantry weapons in most modern armies...

. It used a bolt attached to a spring in a tube above the barrel. The TKB-010 was intended to force the weight forward as means of increasing accuracy.
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