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Most current gas systems employ some type of piston. The face of the piston is acted upon by combustion gas from a port in the barrel or a trap at the muzzle. Early guns, such as Browning's "flapper" prototype, the Bang rifle, and the Garand rifle, used relatively low-pressure gas from at or near the muzzle. This, combined with larger operating ...
The M1 Garand or M1 rifle [nb 1] is a semi-automatic rifle that was the service rifle of the U.S. Army during World War II and the Korean War.. The rifle is chambered for the .30-06 Springfield cartridge and is named after its Canadian-American designer, John Garand.
When first recommended for adoption, M1 Garand rifles were chambered for the .276 Pedersen, which held ten rounds in its unique en-bloc clips. [1] The .276 Pedersen was a shorter, lighter and lower pressure round than the .30-06, which made the design of an autoloading rifle easier than the long, powerful .30-06.
Firearms with a direct impingement design can, in principle, be constructed lighter than piston-operated designs. Because high-pressure gas acts directly upon the bolt and carrier in a direct impingement system, it does not need a separate gas cylinder, piston, and operating rod assembly of a conventional piston-operated system, only requiring a gas tube to channel gas from the barrel back ...
The .30-06 cartridge, with the 173 grains (11.2 g) bullet was called cartridge, .30, M1 ball. The .30-06 cartridge was far more powerful than the smaller Japanese 6.5×50mm Arisaka cartridge and comparable to the Japanese 7.7×58mm Arisaka. The new M1 ammunition proved to be significantly more accurate than the M1906 round. [22]
The .30 M1 and M1A1 ammo boxes were packed four to a crate that weighed around 90 pounds and had a volume of 1 cubic foot. The M1 ammo crate held a total of 1,000 belted or linked rounds packed in 4 M1 ammo boxes and the later M1A1 ammo crate held a total of 1,000 belted or 1,100 linked rounds packed in M1A1 ammo boxes.
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In four more years, almost to the day, an improved version of rifle T1E1 would be adopted as the M1. As Springfield Armory tooled for and refined the Garand, Pedersen continued to work on another rifle. He developed a .30 caliber model with a conventional gas-trap piston and multi-piece operating rod system.