The TKB-09 (ТКБ-09) was a

Soviet The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

delayed blowback Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gas created by the ignition of the propellant charge. Several blowback systems exist wi ...

assault rifle An assault rifle is a select fire rifle that uses an intermediate cartridge, intermediate-rifle cartridge and a Magazine (firearms), detachable magazine.C. Taylor, ''The Fighting Rifle: A Complete Study of the Rifle in Combat'', F.A. Moyer '' ...

chambered in 5.45×39mm. It used a bolt attached to a spring in a tube above the barrel. The TKB-09 was intended to force the weight forward as means of increasing accuracy. TKB-010 was the variant chambered in 7.62×39mm.

References

{{Use dmy dates, date=June 2017 7.62×39mm assault rifles Delayed blowback firearms Trial and research firearms of the Soviet Union Assault rifles of the Soviet Union Tula Arms Plant products