The 2A46 (D-81T) is a 125mm/L48 smoothbore cannon of Soviet origin used in several main battle tanks. It was developed by the Spetstekhnika design bureau in Ekaterinburg in the 1960s originally for the T-64A tank. They were then manufactured at Artillery Plant No.9 in Ekaterinburg and Motovilikha in Perm.
The 2A46 can fire armour piercing fin-stabilised discarding sabot (APFSDS), high explosive anti-tank (HEAT) and high explosive fragmentation (HEF) projectiles. The ammunition for the 2A46 gun is 2-piece, in that the projectile is loaded first, followed by a separate propellant charge.