The AK-15 is a variant of the AK-12 chambered in 7.62×39mm. Both the AK-12 and AK-15 have been developed by the Kalashnikov Group under the "Ratnik" program and have been accepted into Russian military service. The only difference between the AK-12 and the AK-15 is their caliber. The AK-15 weighs 3.5 kg (7.72 lb) when empty, a full length of 940 mm (37 in), a barrel length of 415 mm (16.3 in), barrel twist rate of 265 mm (10.4 in), and a standard magazine capacity of 30 rounds.