3-inch M1902 field gun

3-inch Gun, Model of 1902, 1904, and 1905
M1905 model
Type	Light field gun
Place of origin	United States
Service history
In service	1902–1919
Used by	US Army
Wars	World War I
Production history
Designer	Watervliet Arsenal
Designed	1902
Produced	1902–1917
No. built	M1902: 182 M1904: 40 M1905: 441
Variants	M1902, M1904, M1905
Specifications
Mass	gun & breech : 835 lb (379 kg) (1902 & 1904) 788 lb (357 kg) (1905); 2,520 lb (1,140 kg) gun & carriage total.
Length	180 in (460 cm) From trail to muzzle
Barrel length	28 calibers, 7 feet (2.1 m) (bore)
Width	76 in (190 cm)
Height	63 in (160 cm)
Crew	5
Shell	Fixed QF 76.2 x 273mm R[1]
Shell weight	15 lb (6.8 kg)
Calibre	3-inch (76.2 mm)
Breech	Interrupted screw, De Bange type
Recoil	hydro-spring, 45 inches (1.14 m)
Carriage	wheeled
Elevation	-5° to +15°
Rate of fire	15 rounds per minute
Muzzle velocity	1,700 ft/s (520 m/s)
Effective firing range	6,000 yd (5,500 m) at 15° elevation
Maximum firing range	8,500 yd (7,800 m) approx.
Feed system	hand

The 3-inch Gun, Model of 1902 was the U.S. Army’s first nickel steel, quick-firing field gun with a recoil mechanism. Like its predecessor the 3.2-inch gun M1897, it was a rifled breechloader.