AO-63 Country of origin Soviet Union / Russian Federation Designer TsNIITochmash Production began 1986 Weapon type Assault rifle Caliber 5.45 x 39 mm Overall length 890 millimeters Weight empty 3.68 kilograms Cyclic rate 850 or 6000 rounds per minute Maximum effective range 600 meters

The AO-63 is a Soviet two-barrel assault rifle chambered for the 5.45 x 39 mm round. It was designed by S. G. Simonov and P. A. Tkachev, and manufactured by TsNIITochMash.

It uses an over/under barrel configuration, and it can reach a maximum rate of fire of 6000 rounds/min, when fired in two-round burst mode, making it the fastest firing assault rifle known. According to some sources the weapon uses a top mounted drum magazine with a capacity of 50 or 100 rounds.

The AO-63 assault rifle was used by the Spetsnaz during the "Abakan" trials in the mid-1980s, in search of a more accurate alternative to take place over the standard issue AK-74, with AN-94 being the winner among numerous other weapons.

EvidenceEdit

• Source 1
• Source 2 (In Russian)
• Ружье" 1_1998 "Эйнштейн, Чехов и Платон?
• Oruzhie magazine, Pages 6/7/8, Issue No1 1998.