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From the viewpoint of physics (dynamics, to be exact), a firearm, as for most weapons, is a system for delivering maximum destructive energy to the target with minimum delivery of energy on the shooter. [citation needed] The momentum delivered to the target, however, cannot be any more than that (due to recoil) on the shooter.
The M60, a general-purpose machine gun chambered in 7.62×51mm NATO. A machine gun is a fully-automatic firearm, chambered in intermediate or full-power rifle cartridges, designed to provide sustained automatic direct fire as opposed to the semi-automatic or burst fire of standard rifles.
An M40 recoilless rifle on its M79 "wheelbarrow" tripod Diagram of the operation of a recoilless rifle using a vented case. A recoilless rifle (), recoilless launcher (), or simply recoilless gun, sometimes abbreviated to "RR" or "RCL" (for ReCoilLess) [1] is a type of lightweight artillery system or man-portable launcher that is designed to eject some form of countermass such as propellant ...
The "true gun" appears to have emerged in late 1200s China, around 300 years after the appearance of the fire lance. [4] [5] Although the term "gun" postdates the invention of firearms, historians have applied it to the earliest firearms such as the Heilongjiang hand cannon of 1288 [17] or the vase shaped European cannon of 1326. [18]
Adopted in 1959 in Army service, the M67 was used in the Vietnam War together with the much larger 106 mm M40. [3] The M67 proved an effective weapon, though it was primarily used against personnel in combat, and saw little or no use against armor and even against fortifications. [4]
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Gunsmiths may adjust the length of pull of custom-built firearms or older firearms by cutting off a portion of the buttstock or adding a recoil pad to the buttstock. [3] Some sources [ 1 ] [ 4 ] suggest a shooter's optimum length of pull will allow the butt of the firearm to exactly reach the inside of the elbow when the hand of that arm grips ...
A gun is a normally tubular weapon or other device designed to discharge projectiles or other material. [20] The projectile may be solid, liquid, gas, or energy and may be free, as with bullets and artillery shells, or captive as with Taser probes and whaling harpoons .