MAC-11

Infobox Weapon
name=Model 11 Advancement 1 (M-11A1)


caption= M11A1 with retracted stock
origin=flagcountry|United States
type=Submachine gun / machine pistol
is_ranged=yes
service=
used_by=Police, and military elements
wars=
designer=Gordon B. Ingram
design_date=1972
manufacturer= Several
production_date=1972-
number=
variants=
weight=1.59 kg
length=248 mm (531 mm with open stock)
part_length=
crew=
cartridge=.380 ACP
caliber=
action=Blowback
rate=1200 rounds/min
velocity=980 ft/s
range=25 m
max_range=
feed=16 or 32-rounds box magazine
sights=Iron sights

The Ingram MAC-11 (Military Armament Corporation Model 11 Advancement 1 or M11A1) is a machine pistol designed by Gordon Ingram at the Military Armament Corporation (MAC) during the 1970s. The weapon is a sub-compact version of the Model 10 (MAC-10), and is chambered to fire a smaller .380 ACP round. This weapon is sometimes confused with the Sylvia & Wayne Daniels M-11/9 or the Vulcan M-11-9, both of which are chambered for 9 mm Luger Parabellum. The M11/9 was made after the M11A1 and is seen by many to be a copy with upgrades. Like the larger M-10, the M-11 has open sights with the rear pinhole sight welded to the receiver. These sights are for use with the folding stock, as using them without the stock is nearly useless because of the initial jump of the weapon due to its heavy, open-bolt design. The M-11A1 also has two safety features which are also found on the Model 10A1. The charging handle rotates to the 90 degrees to lock the bolt in the forward position thus preventing the weapon from being cocked. The second safety is a slider which is pushed forward to lock the trigger, which in turn pins the bolt to the rear (cocked) position. This prevents the weapon from discharging even when dropped, which is a typical problem with the open-bolt design.

ound suppressors for the M-11A1

The M-11A1's suppressor uses wipes instead of the reflex type that Mitchell Werbell III created for the M-10. Though this type does not last as long as the reflex suppressor, it proved to be exceptionally quiet. At one point, a special briefcase was made that could hold an M-11 with its suppressor attached, similar to the famed H&K MP5K case. The gun could be fired from inside the briefcase by pushing a button. A business card was cleverly placed over the hole where the bullets exited, totally disguising it. This case was intended for use by VIP protection, and needs to be registered with BATF; the case is considered to be an "Any other weapon" if used in conjunction with a semi automatic firearm, which requires separate registration in addition to the gun and its suppressor.

Performance

The rate of fire of the M-11A1 is listed in most manuals as approximately 900 rpm (rounds per minute), though in reality, it is closer to 1200 rpm. [Cite news | title = Ingram MAC Model 10 / M10 and Model 11 / M11 submachine guns (USA) | publisher = Official site | date = 2007-07-28 | url = http://world.guns.ru/smg/smg22-e.htm | accessdate = 2007-07-28] Like most automatic weapons, the cyclic rate is sensitive to variables like the loading of the ammunition and the thickness of the recoil buffer. At this incredibly high rate of fire, the weapon is difficult to control while on full-auto, but quick bursts can cause devastating results at ranges up to about convert|30|yd|m. Because of the low penetration of the .380 ACP round, the M-11A1 has found uses in situations where a more powerful round could pass though a wall and inflict collateral damage. The M-11A1 has found uses with some security forces, and most special task forces around the world have used them during in-vehicle operations such as an airliner because of the low penetration of the .380 round.

Limited success

The M-11A1 is the least common version in the MAC family of firearms. This is mostly due to the .380 ACP round (approximately convert|950|ft/s|m/s|abbr=on and has convert|200|ft.lbf|J|abbr=on of energy), which is widely considered to have insufficient stopping power. At such a high cyclic rate, extreme trigger discipline is required to discharge short bursts, which are required for combat expediency. Without proper training, the natural tendency of the inexperienced shooter is to hold down the trigger, discharging the entire magazine in little more than a second, likely with the majority of fire grossly displaced by recoil. Because of the weapon's dubious chambering and uninspiring controlability, it has not enjoyed popularily among professional organizations, but still can be found in a variety of (largely personal) arsenals worldwide.

Manufacturers

MAC-type pistols were first manufactured by the Military Armament Corporation, and later by RPB Inc., Sylvia/Wayne Daniel Inc., Cobray, Jersey Arms, Leinad, MasterPiece Arms, and Vulcan. Modern manufacturers include:

# [http://www.cobray.com Cobray] currently manufactures the required parts which are assembled into functional firearms by Leinad (Daniel spelled backwards). Leinad, because it assembles the MAC-10, is legally considered the manufacturer.Fact|date=April 2007
# [http://www.masterpiecearms.com MasterPiece Arms] currently manufacturers possibly the highest quality line of "MACs" ever built, utilizing several of their own small design improvements like a non-spinning bolt handle and a redesigned bolt.
# [http://vulcanarmament.com/cgistore/store.cgi?page=/new/catalog.html&setup=1&ida=90&idp=0&his=0&cart_id=6833190.3024 Vulcan Arms] makes a full line of "MACs." Vulcan appears to have borrowed a few improvement ideas from MasterPiece Arms, but not all. Their .45 has a non-spinning bolt handle, but not their 9 mm. Vulcan uses a hex bolt to secure the upper receiver to the lower receiver, which is unusual. Vulcan's "MAC" carbines are definitely unique in their design and appearance.

ources

* [http://www.firearmsid.com/Feature%20Articles/012001/Mac10History.htm Randal Stepan, Nolan Wilson, Gary Reisewitz. "Mac-10 Cookbook." Arkansas: Desert Publications, 1989] .

ee also

* MAC-10
* MGP-84
* List of firearms