AO-63

The AO-63 is a Soviet twin-barreled, AK-derived assault rifle chambered for the 5.45×39mm round. It was designed by Sergei Simonov and Peter Tkachev, and manufactured by TsNIITochMash. It uses a side-by-side barrel configuration, primarily to fire in two-round burst mode with a 0.01 second delay to increase ballistic performance.

The AO-63 is a gas-operated, 5.45×39mm caliber, AK-derived twin-barreled assault rifle. The weapon has side by side barrels with the right barrel predominant, twin rotating bolts/gas pistons and ejects from both sides. The trigger group has a three-position selector on the right side of the receiver, the first is semi auto firing one barrel, the second in full auto firing both barrels with a 0.01 second delay, the third is unique as at first it fires a two-round burst then one barrel in 850 rounds/min full auto. The magazine is unusual as it has the main double column holding 30 rounds with a single column holding 15 rounds.

In When the Cold Breeze Blows Away, this twin-barreled assault rifle is adopted by both the Coalition of the Red Star and the Beleninsk Pact, basically an eastern rival to the western Gilboa DBR Snake.

In addition, a unique variant of this weapon, called the AO-63 Combat Candy, acts as the personal weapon of Natalya Von Konfety.