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The M3 was commonly referred to as the "Grease Gun" or simply "the Greaser", owing to its visual similarity to the mechanic's tool. [13] The M3 was intended as a replacement for the Thompson, and began to enter frontline service in mid-1944. By late 1944, the M3A1 variant was introduced, which also saw use in the Korean War and later conflicts.
Lincoln patented the first lever grease gun to work with a full stroke operation called the Model 1242. This meant that a hand-held grease gun could generate up to 10,000 lbf/in² (70 MPa) of pressure. Operators of the unit could push grease into blocked or "frozen" fittings and the unit allowed for work in confined areas.
A grease gun (pneumatic) A grease gun is a common workshop and garage tool used for lubrication. The purpose of the grease gun is to apply lubricant through an aperture to a specific point, usually from a grease cartridge to a grease fitting or 'nipple'. The channels behind the grease nipple lead to where the lubrication is needed.
General Thompson envisioned a "one-man, hand-held machine gun" chambered in .45 ACP to be used as a "trench broom" for the ongoing trench warfare of World War I. [35] Oscar V. Payne designed the new firearm along with its stick and drum magazines. The project was titled "Annihilator I".
Some simple submachine gun designs, such as the Sten, can discharge spontaneously when dropped onto a hard surface – even when uncocked – as the collision can jolt the bolt backward far enough that on returning it will pick up a round from the magazine, chamber it and fire it; the risk is intrinsic to hand-held open-bolt guns unless safety ...
The designer, Sergei Simonov, began his work with a gas-operated self-loading rifle in 1930. The first prototype was ready in 1931 and appeared promising, and three years later a trial batch of an improved design was made. In 1935, a competition between Simonov's design and a rifle made by Fedor Tokarev was held. The Simonov rifle emerged as a ...
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The barrel lacked any form of insulation, which often resulted in burns on the supporting hand if it was incorrectly positioned. [13] The MP 40 also has a forward-folding metal stock, the first for a submachine gun, resulting in a shorter overall weapon when folded. [ 14 ]