M1 carbine
semi-automatic rifle
The M1 Carbine (formally the United States Carbine, Caliber .30, M1) is a lightweight semi-automatic carbine chambered in the .30 carbine (7.62×33mm) cartridge that was issued to the U.S. military during World War II, the Korean War, and the Vietnam War. The M1 Carbine was produced in several variants and was widely used by military, paramilitary, and police forces around the world after World War II, most notably by the armed forces of South Korea and South Vietnam.
The M2 Carbine is the selective-fire version of the M1 Carbine, capable of firing in both semi-automatic and full-automatic. The M3 Carbine was an M2 Carbine with an active infrared scope system.
Despite having a similar name and physical outward appearance, the M1 Carbine is not a carbine version of the M1 Garand rifle. On 1 July 1925, the U.S. Army began using the current naming convention where the "M" is the designation for "Model" and the number represents the sequential development of equipment and weapons. Therefore, the "M1 Carbine" was the first carbine developed under this system. The "M2 Carbine" was the second carbine developed under the system, etc.
Development history
Limitations of weapons in the U.S. arsenal
Before World War II, the U.S. Army Ordnance Department received reports that the full-size M1 rifle was too heavy and cumbersome for most support troops (staff, artillerymen, radiomen, etc.) to carry. During pre-war and early war field exercises, it was found that the M1 Garand impeded these soldiers' mobility, as a slung rifle would frequently catch on brush or hit the back of the helmet and tilt it over the eyes, impairing vision.
“M1 carbine” enters the record as semi-automatic rifle. Crown Archives preserves that source wording while asking what carbine, semi-automatic and rifle can confirm, complicate or overturn.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q695988. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1925.
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This entry incorporates text from “M1 carbine” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.