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MAC-10
The MAC-10 (Military Armament Corporation Model 10, officially the M-10) is a compact, blowback operated machine pistol developed by Gordon B. Ingram in 1964. It is chambered in either .45 ACP or 9mm. A two-stage suppressor by Sionics was designed for the MAC-10, which not only abated the
noise created, but made it easier to control on full automatic (although it also made the gun far less compact and concealable).
==Design==
The M-10 was built predominantly from steel stampings. A notched cocking handle protrudes from the top of the receiver, and by turning the handle 90° would lock the bolt, and act as an indicator the weapon is unable to fire. The M10 has a telescoping bolt, which wraps around the rear face of the barrel. This allows a more compact weapon and balances the weight of the weapon over the pistol grip, where the magazine is located. The M10 fires from an open bolt, and the light weight of the bolt results in a rapid rate of fire. 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 barrel is threaded to accept a suppressor, which worked by reducing the discharge's sound, without attempting to reduce the velocity of the bullet. This worked well with the .45 ACP versions, as most loads are subsonic already, as opposed to special, low-powered subsonic loads usually required for suppressed 9mm weapons. At the suggestion of the United States Army, the suppressor also acted as a foregrip to inhibit muzzle rise when fired. Ingram added a small bracket with a small strap beneath the muzzle to aid in controlling recoil during fully automatic fire. The original rate of fire for the M10 in .45 is approximately 1090 rounds per minute. That of the 9mm M11/9 is approximately 1250 rounds per minute, and that of the smaller MAC-11 in .380 ACP is 1380 rounds per minute.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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