The TKB-0146 (Russian: ТКБ-0146) is a bullpup assault rifle prototype designed by Igor Yakovlevich Stechkin at the TsKIB SOO. The gun participated in the Russian Army's Project Abakan assault rifle trials.Nikonov's AS[M] and Stechkin's design were the only two truly innovative designs in the Abakan competition that made it to the final testing round; all other 6 competitors that made it that far were based on more conventional designs.