MAC-11
The Military Armament Corporation Model 11, officially abbreviated as "M11" or "M-11", and commonly known as the MAC-11, is a machine pistol/submachine gun developed by American firearm designer Gordon Ingram at the Military Armament Corporation (MAC) during the 1970s in Powder Springs, Georgia, United States. The weapon is a sub-compact version of the Model 10 (MAC-10), and is chambered to fire the smaller.380 ACP round. This weapon is sometimes confused with the Sylvia & Wayne Daniels M-11/9, its successor the Leinad PM-11, or the Vulcan M-11-9, both of which are later variants of the MAC chambered for the 9 mm Parabellum cartridge.
Also recorded as Military Armament Corporation Model 11 · M11 · M-11
MAC-11
Stephen Z · SOCOM M11 · CC BY-SA 2.0
- Name
- Military Armaments Corporation M11
- Field
- machine pistol
- Period
- 1972
- Region
- United States
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Documentary summary
The Military Armament Corporation Model 11, officially abbreviated as "M11" or "M-11", and commonly known as the MAC-11, is a machine pistol/submachine gun developed by American firearm designer Gordon Ingram at the Military Armament Corporation (MAC) during the 1970s in Powder Springs, Georgia, United States. The weapon is a sub-compact version of the Model 10 (MAC-10), and is chambered to fire the smaller.380 ACP round. This weapon is sometimes confused with the Sylvia & Wayne Daniels M-11/9, its successor the Leinad PM-11, or the Vulcan M-11-9, both of which are later variants of the MAC chambered for the 9 mm Parabellum cartridge.
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In this article
Overview
Overview
Cobray also made a.380 ACP variant called the M12.
Cobray M11/9
Stephen Z · Cobray M11
Cobray m11/9
Stephen Z · Cobray M11
Key facts
Key facts
• Name — Military Armaments Corporation M11 • Origin — United States • Type — Machine pistol Submachine gun • Is Ranged — Yes • Service — 1972–present • Used By — See Users • Wars — Lebanese Civil War • Designer — Gordon Ingram • Design Date — 1972 A prototype was in development in 1964 and 1965 • Manufacturer — * Military Armament Corporation • Cobray Company • RPB • SWD Inc. • Jersey Arms • Leinad • MasterPiece Arms • Production Date — 1972–present • Variants — MAC-11A1 MAC-11/9 • Weight — 1.59 kg (3.50 lbs) • Length — 248 mm (531 mm stock extended) (9.76 in/20.90 in) • Part Length — 129 mm (5.08 in) • Cartridge —.380 ACP (9×17mm) 9×19mm Parabellum • Action — Straight blowback • Rate — 1200 rounds/min • Range — * 50 meters (.380 ACP) • 70 meters (9×19mm Parabellum) • Feed — 16 or 32-round box magazine • Sights — Iron sights
Design
Design
• Illustration — MAC-11 machine pistol
Operation
Operation
Like the larger M-10, the M-11 has iron 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 90 degrees to lock the bolt in the forward position thus preventing the weapon from being cocked. The second safety is a slider that 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 not uncommon with an open-bolt design.
Performance
Performance
The rate of fire of the M-11A1 is one of the biggest complaints about the firearm. Listed as 1,200 rounds per minute, the MAC-11's high cyclic rate is able to empty the entire 32-round magazine in about two seconds, which many users view as a drawback. Extreme trigger discipline is required to discharge short bursts, which are required for combat effectiveness. Without proper training, the natural tendency of the inexperienced shooter is to hold down the trigger, discharging the entire magazine, often with poor accuracy due to recoil. The rate of fire also varies depending on the weight of bullets used. The gun also has a selector switch that allows it to fire only one round at a time in semi-automatic mode. Noting the weapon's poor accuracy, in the 1970s International Association of Police Chiefs weapons researcher David Steele described the MAC series as "fit only for combat in a phone booth". The M-11 is the least common version in the MAC family of firearms.
Sound suppressor
Sound suppressor
• Illustration — M11/9 with 32-round magazine and suppressor A specific suppressor was developed for the MAC-11, which used wipes as baffles, instead of the reflex baffles that Mitchell WerBell III created for the MAC-10. Though wipes are less durable than reflex baffles, they had the advantage of proving quieter for the MAC-11. The suppressor is 224 mm long and is covered with Nomex, a heat-resistant material.
Manufacturers
Manufacturers
• Illustration — MasterPiece Arms MPA30AT, a modern iteration of the MAC-11 design MAC-type submachine guns and semi-automatic pistols were first manufactured by the Military Armament Corporation, and later by RPB Inc., Cobray (later named Leinad, then Sylvia/Wayne Daniel Inc.), Jersey Arms, MasterPiece Arms, and Vulcan.
Users
Users
• Argentina: In 1972, 20 were acquired for police and intelligence services. A further 24 were acquired for the Army and air force in 1973. • Brazil: SWD M11/9 formerly used by GRUMEC • Colombia: 25 acquired by police forces in the 1970s • Chile: Cobray M11/9 formerly used by special forces • Dominican Republic • Guatemala: 135 acquired for police forces in 1973 • Haiti • South Korea: 28 acquired for special forces in the 1970s • Slovenia • Venezuela: Known to be used by the Cuerpo de Investigaciones Científicas Penales y Criminalísticas (Scientific Penal and Criminal Investigations Corps).
Non-state users
Non-state users
• Forces_Libanaises_Flag.svg Lebanese Forces
Places
Named by the record
Places
Only places the record itself states, plotted where the house gazetteer settles their coordinates. Nothing is inferred from a name or a nationality.
- United States
General and cited references
General and cited references
• Stepan, Randal; Nolan Wilson, Gary Reisewitz (1989). Mac-10 Cookbook;. Arkansas: Desert Publications.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Weapon.ge – Modern Firearms Encyclopedia. MAC Ingram M10 / M11 (USA).
- 2.Hogg, Ian. Jane's Infantry Weapons 1989-90, 15th Edition. Jane's Information Group. 117. 1989. 0-7106-0889-6.
- 3.Military Armament Corporation. Operation and Maintenance Manual: Military Armament Corporation. 2, 5, 28.
- 4.CURRENT FIREARM DESIGNS AND AMMUNITION PRODUCTION METHODS DEVELOPED BY GORDON B. INGRAM 1 November 1977
- 5.Frank Iannamico. The Mac Man: Gordon B. Ingram and His Submachine Guns. 103. 978-0-9823918-1-5.
- 6.Jack Lewis. Assault Weapons. Krause. 76. 2004.
- 7.Jones, Richard. Jane's Infantry Weapons 2009-2010. Jane's Information Group. 139. 2009. 978-0-7106-2869-5.
- 8.Jerry Lee. The Gun Digest Book of Guns & Prices 2011. Gun Digest Books. 235. 2011. 978-1440235436.
- 9.Official site. Ingram MAC Model 10 / M10 and Model 11 / M11 submachine guns (USA).
- 10.Jack Lewis. Assault Weapons. Gun Digest Books. 79–. 28 February 2011. 978-1-4402-2400-3.
- 11.Iannamico, Ian. Manufacturing History of Ingram-MAC Type Firearms. Small Arms Review. Chipotle Publishing, LLC. 20. 1. 104.
- 12.Walker, Robert E. Cartridges and Firearm Identification. CRC Press. 216, 241, 322. 2012. 978-1466502062.
- 13.wiw_sa_argentina - worldinventory. 2016-11-24.
- 14.Olive, Ronaldo. Enciclopedia De Submetralhadoras. 272.
- 15.wiw_sa_colombia - worldinventory. 2016-03-12.
- 16.wiw_sa_chile - worldinventory. 2015-05-18.
- 17.wiw_sa_dominicanrepublic - worldinventory. 2016-11-24.
- 18.wiw_sa_guatemala - worldinventory. 2016-11-24.
- 19.wiw_sa_haiti - worldinventory. 2016-11-24.
- 20.wiw_as_koreasouth - worldinventory. 2015-12-30.
- 21.wiw_eu_slovenia - worldinventory. 2016-11-24.
- 22.Early Colt SP1 self-loading rifle in Venezuela – Armament Research Services.
- 23.Lebanese Forces: The Weapons: Sub Machine Guns (SMG). 2016-03-03.
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
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