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The Thompson submachine gun (also known as the "Tommy gun", "Chicago typewriter", or "trench broom") is a blowback-operated, selective-fire submachine gun, invented and developed by Brigadier General John T. Thompson, a United States Army officer, in 1918.
The M3 became the main submachine gun over the Thompson for the U.S. and South Korean forces during the Korean War, because the Communists used the Thompson submachine gun, which the U.S. donated during World War II, as one of their main weapons during the war. [24] The M3 and M3A1 were largely withdrawn from U.S. frontline service beginning in ...
A muzzle brake or recoil compensator is a device connected to, or a feature integral (ported barrel) to the construction of, the muzzle or barrel of a firearm or cannon that is intended to redirect a portion of propellant gases to counter recoil and unwanted muzzle rise. [1] Barrels with an integral muzzle brake are often said to be ported.
Thompson Autorifle Model 1923 (top) and SMG Model 1921. The Thompson Autorifle, (also referred to as the Thomoson Model 1923 Autoloading Rifle; and the .30-06 Model 1923 Semi-Automatic Rifle, among others, etc.) was a semi-automatic rifle that used a Blish Lock to delay the action of the weapon.
The usual recoil system in modern quick-firing guns is the hydro-pneumatic recoil system. In this system, the barrel is mounted on rails on which it can recoil to the rear, and the recoil is taken up by a cylinder which is similar in operation to an automotive gas-charged shock absorber , and is commonly visible as a cylinder mounted parallel ...
Petroleum-based rust-inhibitors provide several benefits, including the ability to creep over metal, covering missed areas. [citation needed] Additionally, a petroleum, solvent-free rust inhibitor remains on the metal surface, sealing it from rust-accelerating water and oxygen. Other benefits of petroleum-based rust protection include the self ...
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Muzzle devices can reduce the recoil impulse by altering the pattern of gas expansion. For instance, muzzle brakes primarily works by diverting some of the gas ejecta towards the sides, increasing the lateral blast intensity (hence louder to the sides) but reducing the thrust from the forward-projection (thus less recoil).