William Crozier was a career United States Army officer in the Ordnance Corps and the 11th Chief of Ordnance.
Cartoon of the American delegation to the International Peace Conference, 1899, featuring Captain Crozier, third from left
M1911 pistol
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The Colt M1911 is a single-action, recoil-operated, semi-automatic pistol chambered for the .45 ACP cartridge. The pistol's formal U.S. military designation as of 1940 was Automatic Pistol, Caliber .45, M1911 for the original model adopted in March 1911, and Automatic Pistol, Caliber .45, M1911A1 for the improved M1911A1 model which entered service in 1926. The designation changed to Pistol, Caliber .45, Automatic, M1911A1 in the Vietnam War era.
M1911 designer John Browning
Cross-section diagram, with labeled parts, of original Model 1911 pistol, from official Army description as published in 1917.
Springfield Mil Spec field stripped