M68 (tank gun)

M68
Front view of a M68E1 gun on an American M60A3 main battle tank during a military exercise in Nuremberg, 1986.
Type	Tank gun
Place of origin	United States United Kingdom
Service history
In service	1960–present
Production history
Designer	Watervliet Arsenal
Manufacturer	Watervliet Arsenal
Produced	1959–present
Variants	M68E1, M68A1, M68A1E4
Specifications
Mass	754 kg (1,662 lb) (gun tube) 1,128 kg (2,487 lb) (recoiling gun mass)
Length	5,550 mm (218.50 in) (overall)
Barrel length	5,347 mm (210.51 in) (gun tube)
Shell	105×617mm. R
Calibre	105 mm (4.134 in)
Breech	semi-automatic vertical sliding-breechblock
Recoil	305 mm

The M68 is an American 105 mm tank gun. It uses British-designed L7 gun tube and cartridges with an American-designed mount, breech assembly and recoil mechanism.