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.

[3] Stechkin's gun was slightly more accurate than Nikonov's, but turned out less reliable, mainly because it accumulated more fouling.

Squeezing the main trigger slightly fired off a single round.

[4][3] Two examples can be seen in the Tula arms museum; one of these is an early prototype that was configured for three-round bursts rather than two, which was the option for the later models.