Peter Andreevich Tkachev
Peter Andreevich Tkachev was a Russian weapons engineer for TsNIITochMash. He is known to have worked on and modifiy various weapons such as the AO-38, AO-46, AO-62 and AO-63 assault rifles as well as developing the Balanced Automatics Recoil System (BARS) used in the AK-107.