3-inch anti-aircraft gun M3
The 3-inch anti-aircraft gun M3 was an American anti-aircraft gun which served throughout the 1930s and into early World War II. Developed from the earlier 3-inch M1917 and 3-inch M1918 guns,
it was in the process of being replaced by the time of the US entry into World War II, but was subsequently adapted into an anti-tank gun role, both free-standing and in a self-propelled tank destroyer. It may have seen action in the Pacific Theatre.
A 3-inch M3 anti-aircraft gun on a M2A2 carriage, preserved in Brazil
The predecessor of the M3; the M1918 in traveling position.
No. 2 Gun Crew, Btry D, 208th CA AA, man their 3-inch AA gun at New Fighter Strip, Dobodura, New Guinea (17 May 1943).
Secretary of War James W. Good inspects an M3 in traveling position near the White House in 1929.
The 3-inch gun M1918 was a United States 3-inch anti-aircraft gun that entered service in 1918 and served until it was largely superseded by the 3-inch anti-aircraft gun M3 in 1930, though the M1918 remained with some National Guard units until early in World War II. The M3 was subsequently replaced by the M1 90mm AA gun early in World War II, primarily during 1942. 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.
3-inch M1918 on towed trailer mount
3-inch M1917
Gun crew man their 3-inch M3 at New Fighter Strip, Dobodura, New Guinea
M10 tank destroyer, sporting the 3-inch M7
