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The Masterkey is a door breaching shotgun system manufactured by Knight's Armament Company. The Masterkey project was initiated during the 1980s to provide assault rifles with a potent built-in door breaching tool. Individual soldiers were often forced to carry a breaching shotgun in addition to their standard-issue rifle, but the Masterkey ...
A US Marine practices shotgun door-breaching techniques. A breaching round or slug-shot is a shotgun shell specially made for door breaching.It is typically fired at a range of 6 inches (15 cm) or less, aimed at the hinges or the area between the doorknob and lock and doorjamb, and is designed to destroy the object it hits and then disperse into a relatively harmless powder.
Failure to feed (FTF) is when a firearm fails to feed the next round into the firing chamber. Failure to feed is common when the shooter does not hold the firearm firmly (known as limp wristing), when the slide is not fully cycled by the preceding round, or due to problems with the magazine. It can also be caused by worn recoil springs, buffer ...
The shotgun can be used as a primary weapon by the breacher or be dedicated solely for breaching. If the latter, the shotgun can be holstered or slung in a harness when not in use. [5] There are also breaching shotgun systems which can be mounted to a rifle to avoid the issue of managing two weapons.
The problem is particularly pronounced when armour-piercing fin-stabilized discarding-sabot (APFSDS), a type of long-rod penetrator (LRP) (or kinetic energy penetrator), are used. [23] Since these APFSDS rounds are the most common armour-piercing ammunition currently, virtually no modern main battle tank guns have muzzle brakes.
Repair dented shotgun barrels. Install (solder) or repair rib on shotgun barrels, or repair double-barrel assemblies. Measure and correct head-space dimensions. Check for excessive bore erosion. Troubleshoot and repair feeding, ejecting and firing problems. Test-fire guns with conventional loads to ensure proper operation.
For the breaching role, shorter barrels are preferred, as they are more easily handled in tight quarters. [9] US soldiers in Tal Afar, Iraq, search for insurgents. The soldier in the foreground is carrying an assault rifle and a shotgun on a sling for breaching. Limited ammunition capacity is one of the primary downsides of the combat shotgun.
This is not an issue for break-action single shot firearms, since there is no cycling action to jam, although it could potentially cause accuracy (but not jamming) problems in double barreled rifles, double barreled shotguns, or combination guns, provided they have more than one rifle barrel. Some combination guns, such as "drillings" or ...