[3] The M3 was subsequently replaced by the M1 90mm AA gun early in World War II, primarily during 1942.

[4] The M3 3" gun was later adapted for the anti-tank role, serving as the main armament of the M10 tank destroyer during World War II.

Most of the weapons were deployed at United States Army Coast Artillery Corps seacoast forts after World War I.

This weapon had a barrel 50 calibers long instead of 55 calibers, and a smaller breech (200 cubic inches (3.3 L) instead of 296 cubic inches (4.85 L)[6] with a different cartridge (reportedly 76.2x585R instead of 76.2x690R) featuring the maximal propelling charge decreased from |5.62 pounds (2.55 kg) to 4.94 pounds (2.24 kg).

The 3-inch gun M1918 remained in service, particularly in National Guard units, and saw action in early World War II.