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| Peter Andreevich Tkachev|AO-38 assault rifle Wikipedia
The AO-38 is a 5.45×39mm assault rifle and AK derivative designed by Peter Andreevich Tkachev and first to use the Balanced Automatic Recoil System (BARS) to improve stability giving better accuracy over AK-74's. Its derivatives are the AK-107 and AEK-971.