Colt 9mm SMG
|Colt 9mm SMG|
The Colt 9mm SMG
|Place of origin||United States|
|Used by||See Users|
|Wars||Miami Drug Wars|
|Weight||2.61 kg (5.75 lb) w/o magazine|
|Barrel length||10.5 in|
|Action||blowback, closed bolt|
|Rate of fire||700-1000 round/min|
|Muzzle velocity||396 m/s (1300) ft/s)|
|Effective firing range||100 m|
|Feed system||20- and 32-round detachable box magazine|
The Colt 9mm SMG is a closed bolt, blowback operated SMG, rather than the conventional direct impingement gas operation of the standard 5.56×45mm M16 type rifle. As a closed bolt weapon, the Colt SMG is inherently more accurate than open bolt weapons such as the Israeli UZI.
The overall aesthetics are identical to most M16 type rifles. Changes include a large plastic brass deflector mounted toward the rear of the ejection port. Factory Colt 9mm SMGs are equipped with a 10.5 inch length barrel and have an M16 style upper receiver, which means they feature a fixed carry handle, no forward assist and A1 sights (with 50 and 100 meter settings). The magazine well of the receiver is modified using a special adaptor to allow the usage of smaller 9mm magazines. The magazines themselves are a copy of the Israeli UZI SMG magazine, modified to fit the Colt and lock the bolt back after the last shot.
Current Colt production models are the RO635 which features a Safe/Semi/Full Auto selective fire trigger group and the RO639 which features a Safe/Semi/3-round Burst selective fire trigger group. Both are equipped with a 10.5 inch length barrel. The 633 was a modified compact version with a 7 inches (180 mm) barrel, hydraulic buffer and simplified front sight post used by the DEA.
The most common model is the 635, the latest version of which are simply marked SMG 9mm NATO.
- Argentina: Used by the Argentine Army.
- Bangladesh:Used by SSF and the Dhaka Metropolitan Police SWAT.
- India: Used by the Octopus Unit of Andhra Pradesh Police.
- Israel : Used by IDF special forces. 
- Malaysia: Used by the Pasukan Khas Udara (PASKAU) Counter-Terrorism Forces of the Royal Malaysian Air Force
- United States: Used by the U.S. Marine Corps. Also used by the Drug Enforcement Administration (DEA), the U.S. Marshals Service, Los Angeles Police Department SWAT, U.S. Dept of Justice-Bureau of Prisons and a number of other federal agencies. U.S. Diplomatic Security Service (DSS)
- "War on Drugs". Awesomestories.com. Retrieved 2016-11-07.
- https://web.archive.org/web/20030610171546/http://colt.com/mil/SMG_2.asp Colt Military Catalog
- https://web.archive.org/web/20030610090043/http://colt.com/law/SMG.asp Colt Law Enforcement Catalog
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- Technical Memorandum 2-79. AIMING POINT DISPLACEMENT FROM FIRING A RIFLE FROM THE OPEN-BOLT POSITION. by Dominick J. Giordano I. February 1979. U.S. Army Human Engineering Laboratory 1, U. S. ARMY HUMAN ENGINEERING LABORATORY, Aberdeen Proving Ground, Maryland 21005
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- Sweeney, Patrick (18 January 2016). Gun Digest Book of Suppressors. Iola, Wisconsin: F+W Media, Inc. p. 45. ISBN 978-1-4402-4532-9.
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- "Algunas armas utilizadas por el actual Ejército Argentino". Aquellas armas de guerra. Retrieved 15 November 2014.
- "Dhaka Metropolitan Police SWAT - Overview". bdmilitary. Retrieved 22 February 2009.
- "Sabitha's day out with latest weapons of Octopus". The New Indian Express. Retrieved 2016-11-07.
- "PALSAR Golani operator posing with a Colt 9mm SMG. The weapon is fitted with a sound suppressor and a forward grip.". Retrieved 2016-11-21.
- "PASKAU Malaysian Special Air Service Weapons". Military Factory. Retrieved April 14, 2016.
- "Archived copy" (PDF). Archived from the original (PDF) on 2009-01-10. Retrieved 2014-06-11.
- "Modern Firearms". World.guns.ru. Retrieved 15 November 2014.
- "Chuck Taylor's ASAA -THE COLT M635 9mm SUBMACHINE GUN". Retrieved 15 November 2014.
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