All Russian MBTs are traditionally equipped with a 7.62mm machine-gun mounted coaxially with the main armament.
The PKT machine-gun (Pulemyot Kalashnikova Tankovyi, Kalashnikov Machine-gun Tank version) is used in this role since 1962 when it was introduced instead of the older Goryunov SGMT MG. The differences from the PK unified MG include removal of stock and sights, longer and heavier barrel to facilitate higher rate of fire, solenoid electric trigger, gas regulator and several others.
PKT permits only automatic fire, is belt-fed, and the ammo box holds 250 rounds.
Specifications: Machine-gun: 7.62mm PKT (6P7) Length: 1,098 mm Weight (empty): 10.5 kg Barrel length: 722 mm Barrel weight: 3.23 kg Direct fire range: 650 m (at running target) Effective range: 1,500 m Maximum range: 4,000 m Rate of fire: 700 .. 800 (250 practical) rds/min Ammo box: 250 rounds Ammo box weight: 9.4 kg Total ammo allowance: 2000 rounds (T-72B(M), T-72BK, T-90) 1250 rounds (T-80U, T-80U(M)) 750 rounds (T-80UK) Cartridge type: 7.62x54R model 1908/1930 Ammo types: AP Enh.AP Tracer API Designation round 57-N-323S 7N13 7T2 7BZ3 bullet T-46 B-32 Muzzle velocity, m/s 855 855 824 834 Penetration 6mm @535m 6mm @680m ? 10mm @200m Disp. R50 @300m, cm 9 9 15 15
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