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The barrel is threaded to accept a suppressor, which works by reducing the discharge's sound without attempting to reduce the speed of the bullet. In addition, this design incorporates a built in feed ramp as part of the trigger guard (a new concept at the time) and, to save on cost, the magazine was recycled from the M3 Grease Gun. The M10 fires from an open bolt, and the light weight of the bolt results in a rapid rate of fire. This allows a more compact weapon and balances the weight of the weapon over the pistol grip, where the magazine is located. The M10 has a telescoping bolt, which wraps around the rear face of the barrel. A notched cocking handle protrudes from the top of the receiver, and turns the handle 90°, locks the bolt, and acts as an indicator the weapon is unable to fire. The M10 is built predominantly from steel stampings.
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Military Armament Corporation never used the nomenclature MAC-10 on any of its catalogs or sales literature, but because "MAC-10" became so frequently used by Title II dealers, gun writers, and collectors, it is used more frequently than "M10" to identify the gun.
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The term "MAC-10" is commonly used in unofficial parlance. under the assault weapons ban enacted by Congress in 1994. For a decade, the semi-automatic pistol version of the weapon was forbidden in the U.S.
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A two-stage suppressor by Sionics was designed for the MAC-10, which not only abates the noise created, but makes it easier to control on full automatic (although it also makes the gun far less compact and concealable). The Military Armament Corporation Model 10, officially abbreviated as " M10" or " M-10", and more commonly known as the MAC-10, is a compact, blowback operated machine pistol/ submachine gun that was developed by Gordon B.
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32-round detachable box magazine (9×19mm).30-round detachable box magazine (.45 ACP).
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