Original Item. Only One Available. 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. Like all deactivated ordnance, this is Not Available For Export.

This example is a Model of 1905, a variant of the M1902. It was similar to the Model of 1904, except made about 50 lb (23 kg) lighter by reduction of the outside diameters of the gun and modification of the clip hoop that secures the barrel to the guide rails on the cradle near the muzzle. Different rifling twist.

The bottom of the casing reads:

LOT
3 IN. FIELD GUN
AM. LOT 7327
MOD. OF 02, 04 & 05
F.P.S. CO. 1917

The projectile is painted yellow and retains its original transit plug at the top, which is now seized and cannot be unscrewed. The round together measures roughly 20¼”. The projectile sits fine in the casing, but it is loose, and will come out if picked up by the projectile.  

A fantastic example of a scarce round, ready for further research and display.

During the second half of 1890s the so-called "quick-firing revolution" was underway, and many countries from Russia and Germany to the Transvaal Republic started to adopt guns with some recoil systems, but the Army adopted an outdated 3.2-inch gun M1897 instead. Quickly realizing the mistake, the Ordnance Department alongside the M1897 production started development of what was termed an "accelerated-fire gun", and Captain Charles B. Wheeler designed a 3-inch gun which allowed more shots to be made faster but still required to relay the gun after each shoot. However by 1900, when its procurement was underway, first concrete information about the revolutionary French Canon de 75 modèle 1897 was declassified and new true quick-firing designs with a long recoil by private manufacturers emerged in Europe, and the Commanding General of the United States Army Nelson A. Miles lobbied Secretary of War Elihu Root to block the process. In 1901 long-recoil guns were tested and deemed superior, so in 1902 the Ordnance Department combined Wheeler's piece and an Ehrhardt piece (probably similar to the Norwegian M1901) in one design.

The features of rifling, breech loading with fixed ammunition, and a hydraulic-spring system to absorb the gun's recoil and quickly return it to the firing position combined to improve the range, accuracy, and rate of fire of the gun compared with previous weapons, allowing it to be used more effectively in operations with infantry. These new capabilities allowed the gun to provide accurate indirect fire on targets not in a direct line of sight, which provided crucial firepower for infantry attacks. It was also one of the first US artillery guns with an armored shield to protect the crew from small arms fire. The gun fired 3 inches (76 mm) steel, shrapnel, or explosive shells that weighed 15 pounds (6.8 kg). The use of nickel steel construction meant that the M1902 could fire a heavier shell at a higher muzzle velocity and greater accuracy (due to tighter rifling) than any other field gun of American origin to that point. It had a muzzle velocity of 1,700 ft/s (520 m/s) with an effective range of 6,500 yards (5,900 m), and a maximum range of 8,500 yards (7,800 m). The maximum rate of fire was 15 rounds per minute.