|Place of origin||Soviet Union|
|Designer||Dmitry Ivanovich Shiryayev|
|Weight||3.2 kg (without rounds)|
|Barrel length||415 mm|
|Caliber||7.62 mm (3 mm flechette)|
|Rate of fire||700 rounds/min|
|Muzzle velocity||1060 m/s|
|Feed system||30-round detachable box magazine|
AO-27 was a Soviet assault rifle, chambered for the 7.62 mm fin-stabilized flechette sabot round. The flechette itself had a body diameter of 3 mm. The overall length of the round was 63 mm, and the flechette 55 mm. The weight of the round was 10.5 grams, with 2.4 grams the weight of the flechette.
- "Экспериментальный автомат Ширяева АО-27" (in Russian). Retrieved 27 May 2016.