Peter Andreevich Tkachev

Peter Andreevich Tkachev
Nationality	Russian
Occupation	Small arms designer,
Known for	Designer of the Balanced Automatic Recoil System (BARS)

Peter Andreevich Tkachev was a Russian weapons engineer for . 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.

...
Wikipedia