The Ingram SAM rifles are derivatives of M1 carbines in 5.56×45mm NATO (SAM-1), 7.62×39mm (SAM-2) and 7.62×51mm NATO (SAM-3). The 5.56×45 mm versions accept M16 magazines, AK 7.62×39 mm magazines and 7.62×51 mm versions use FN FAL magazines. They could not compete with the Ruger Mini-14 in the police and civilian markets. Ingram SAM rifles can sometimes be found on auction sites for collectors. [ref. needed] Combat testing of the M2 carbine led to a request from the army`s ground forces, which led to the development of the T13 recoil control, which was adopted in September 1945. [32] The M1 carbine was also one of the most cost-effective weapons used by the U.S. military during World War II. At the beginning of World War II, the average production cost of an M1 rifle was about $45, about half the cost of an M1 rifle at about $85, and about one-fifth the cost of a Thompson submachine gun at about $225.30 caliber rifle ammunition was also much cheaper to produce than standard .30-06 ammunition; used fewer resources, was smaller, lighter, faster and easier to manufacture. These are important factors in the U.S.

military decision to adopt the M1 carbine, especially given the large number of weapons and ammunition manufactured and transported by the U.S. during World War II. [ref. needed] The M1A1 was designed for paratrooper units in May 1942 and came with a folding stock, but was otherwise identical to a standard M1. [96] The M1A1 carbines were manufactured by Inland, a division of General Motors, and were originally equipped with the non-adjustable “L” visor and the bayonet eyeletless conveyor belt. Domestic production of M1A1 rifles was interspersed with domestic production of M1 carbines with standard inventory. Stocks were often exchanged, as carabiners were refurbished in arsenals. The M1 carbine (formerly United States Carbine, .30, M1) is a lightweight semi-automatic rifle[7] that was a standard weapon for the U.S. Army during World War II, the Korean War, and the Vietnam War. The M1 carbine was produced in several variants and was widely used by paramilitary and police forces around the world, and also became a popular civilian firearm after World War II.

The exclusive use of non-corrosive primer ammunition by the rifle was deemed ideal by troops and explosive ordnance personnel in the Pacific, where barrel corrosion was a significant problem with corrosive primers used in .30-06 calibre weapons. [20] In the European theater, however, some soldiers reported misfires due to moisture ingress through the non-corrosive primer compound. [21] The M1 carbine with its reduced-power .30 cartridge was not originally intended as a primary weapon for combat infantrymen, nor was it comparable to the more powerful assault rifles developed at the end of the war. However, it was far superior to the .45 caliber machine guns used at the time in terms of accuracy and penetration,[10] and its lighter .30 caliber cartridge allowed soldiers to carry more ammunition. As a result, the carbine was quickly distributed to infantry officers, U.S. paratroopers, non-commissioned officers, ammunition carriers, forward artillery observers, and other front-line troops. The first M1 carbines were delivered in mid-1942, initially giving priority to troops in the European Area of Operations (ETO).[35] [10] The Viet Minh and Vietcong also used large numbers of M1 and M2 carbines captured by the French, ARVN, and local militias in South Vietnam, as well as several thousand carbines from the North Vietnamese Army (NVA), China, and North Korea. Over time, the SKS and eventually the AK-47 replaced the rifle and became the dominant weapon of the Vietcong. In comparison, the .30-06 Springfield bullet cartridge used by the M1 Garand is nearly three times more powerful than the .30 carbine, while the carbine cartridge is twice as powerful as the .45 ACP caliber Thompson submachine gun that was common at the time. As a result, the rifle offers much better range, accuracy and penetration than these machine guns.

The M1 also weighs half the weight of the Thompson and fires a lighter cartridge. As a result, soldiers armed with the rifle can carry much more ammunition than those armed with a Thompson. [10] At 100 yards (91 m), the M1 carbine can deliver groups between 3 and 5 inches, which is sufficient for its intended use as a short-range defensive weapon. The M1 carabiner has a maximum effective range of 300 yards (270 m). However, the drop in fire is significant after 200 yards (180 m). [17] Therefore, the M1 has a practical effective range of about 200 meters. [23] The United States provided the Army of the Republic of Vietnam with 793,994 M1 and M2 carbines from 1963 to 1973. [59] Along with the tens of thousands of carbines left behind by the French after the First Indochina War, the M1 and M2 carbines were the most commonly issued small arms at the beginning of the Vietnam War and remained in large numbers until the fall of Saigon. The South Vietnamese also received 220,300 M1 Garands and 520 M1C/M1D rifles,[68] and 640,000 M-16 rifles.

The M2 riflescope extended the effective night range of the M3 rifle to 100 meters. In the later stages of the Korean War, an improved version of the M3 carbine with a revised mount, a front pistol grip and a new M3 sniper design was used in the later stages of Korea and briefly in Vietnam. The M3 sniper telescope had a large active infrared heater, which was mounted on the body of the scope itself and allowed use in the supine position. The revised M3/M3 had an effective range of approximately 125 yards. [44] Finally, the M3 rifle and its M3 scope were replaced with passive night vision goggles with extended visible ranges; Improved ranges, in turn, required the use of rifle weapons with flatter trajectories and increased probability of hitting. The M3 carbine was an M2 carbine equipped with a mount that could accommodate an infrared sight for night use. It was originally used with the M1 sniper target and an active infrared sight, and was used with the Army during the invasion of Okinawa in 1945. Before the M3 carbine and the M1 sniper scope were classified by type, they were known as the T3 and T120, respectively.

The system was developed, and at the time of the Korean War, the M3 carbine was used with the M3 sniper. Winchester developed the .30 carbine cartridge for the artillery department. Winchester initially did not submit a rifle design because he was busy developing the .30-06 Winchester M2 military rifle. The M2 rifle comes from a design by Jonathan “Ed” Browning, the brother of famous weapons designer John Browning. A few months after Ed Browning`s death in May 1939, Winchester hired David Marshall “Carbine” Williams, who had begun work on a short-stroke gas piston while serving a prison sentence at a North Carolina work farm. Winchester had hired Williams after Williams` release based on recommendations from gun industry executives and hoped Williams would be able to complete several unfinished designs by Ed Browning, including the .30-06 M2 Winchester rifle. Williams integrated its short-stroke piston into the existing design. After Marine Corps semi-automatic rifle testing in 1940, Browning`s rear-lock tilting pin design proved unreliable in sandy conditions. As a result, Williams reworked the M2 to incorporate a Garand-style rotary pin and service trolley, retaining the short-stroke piston.