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D-56T tank gun
D-56T gun on a PT-76 light tank
Typerifled antitank gun
Place of originSoviet Union
Service history
In service1952–present
Warssee PT-76#Combat service
Production history
DesignerN. Shashmurin and Zh.Y. Kotin
Length42 calibers (3.2 metres)

Calibre76.2 mm (3.03 in)
Carriagevehicle mount
Rate of fire6-8 rounds per minute
Maximum firing range1,500 metres (1,640 yards)

The 76.2 mm D-56T series rifled tank gun is the tank gun used on the PT-76, which is the only known armoured vehicle to carry it.


It has a max effective range of approximately 1500 meters, reduced to 650 meters at night, and a rate of fire of six to eight rounds per minute. This gun is 42 calibers long. A typical ammunition load consists of 24 x OF-350 Frag-HE, 4 x sub-caliber AP-T, 4 x AP-T and 8 x BK-350M HEAT rounds. The gun is mounted in an oval dish-type circular truncated cone turret with flat sloping sides which is mounted over the second, third, and fourth pair of road wheels. All PT-76s have a fume extractor for the main gun at the rear of the turret. Some were fitted with a multi-slotted muzzle brakes. The PT-76 is typically fitted with the D-56T gun with double-baffle muzzle brake and a bore evacuator towards the muzzle.

See also[edit]