3-inch anti-aircraft gun M3
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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.
3-inch gun M5
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The 3-inch gun M5 was an anti-tank gun developed in the United States during World War II. The gun combined a 3-inch (76.2 mm) barrel of the anti-aircraft gun T9 and elements of the 105 mm howitzer M2. The M5 was issued exclusively to the US Army tank destroyer battalions starting in 1943. It saw combat in the Italian Campaign and on the Western Front in Northwest Europe.
M5 on carriage M6 on display at Fort Sam Houston, Texas
3 inch M5 pulled by a halftrack.
M5 near Vielsalm, Belgium, 23 December 1944
The Presidential Salute Guns Battery fires its modified M5 guns outside of the U.S. Capitol, during the 2009 Presidential Inauguration