The Inland Division of General Motors was the largest manufacturer of the U.S. M1 Carbine during World War II, producing over 2.6 million rifles-roughly 43% of the total wartime supply. Stamped on the receiver as "INLAND DIV.", these compact, lightweight firearms were originally designed for support troops, officers, and airborne units requiring more firepower than a pistol but less bulk than the standard M1 Garand. Core Specifications Caliper & Ammunition: .30 Carbine (7.62x33mm). Action: Gas-operated short-stroke piston with a rotating bolt. Barrel Length: 18 inches.Overall Length: 35.75 inches. Weight: Extremely light at roughly 5 pounds, 3 ounces. Magazine Capacity: 15-round or 30-round detachable box magazines. Key Features & MarkingsReceiver Markings: The text "INLAND DIV." is stamped on the rear bridge of the receiver, typically sitting directly behind or underneath the rear sight assembly. Barrel Markings: Original WWII barrels are usually marked near the muzzle with "INLAND MFG. DIV." and the month and year of production (e.g., 4-43). Stock Varieties: Early war variants featured a "high wood" walnut stock protecting the operating slide, which was later changed to a "low wood" design to prevent cracking. They typically featured an "I-cut" or oval slot for the oiler and sling. Sights & Hardware: Features evolved throughout the war from early flip-up aperture rear sights and narrow barrel bands to late-war fully adjustable rear receiver sights and Type 3 barrel bands equipped with a bayonet lug. Notable Historical VariantsM1A1 Paratrooper: Inland was the only company to manufacture this iconic variant, which features a unique folding wire stock and a leather cheek pad designed specifically for airborne troops. M2 Carbine: Inland was one of only two wartime contractors authorized to build this select-fire (semi/full-auto) version.