TKB-059 (ТКБ-059) was a Soviet three-barrel bullpup assault rifle, capable of fully automatic fire, chambered for the 7.62×39mm round and manufactured by Tula Arms Plant in 1966. It was based on the Pribor 3B (Прибор 3Б), a earlier experimental assault rifle with three barrels. Both weapons were developed by the small arms designer G. A. Korobov. Both weapons used a tripled 7.62×39mm magazine with a capacity of 90 rounds, with each barrel independently fed from the magazine. TKB-059 can be fired ambidextrously as the cartridge ejection is downwards behind the magazine area.