OTs-12 “Tiss”- The 9x39 AKS-74U

Summary

This article details the OTs-12 "Tiss," a 9x39mm compact special-purpose rifle developed by Tula's TsKIB SOO in the late Soviet/early post-Soviet period. Based on the AKS-74U, it featured a modified gas system for subsonic ammunition and a high rate of fire, but ultimately did not achieve broad success due to competition from other 9x39mm weapons like the 9A-91 and SR-3 "Vikhr."