Engineering:Colt 9mm SMG

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Short description: Submachine gun manufactured by Colt
"M635" redirects here. For BMW M6/M635CSi, see BMW E24 § M version.
Colt 9mm SMG
The Colt 9mm SMG
TypeSubmachine gun
Place of originUnited States
Service history
In service1982–present
Used bySee Users
WarsInvasion of Panama[1]
Miami drug war[2]
Production history
Produced1982–present
Specifications
Mass2.61 kg (5.75 lb) w/o magazine[3]
Length730 mm (28.9 in ) (stock extended)[3] 650 mm (25.6 in) (stock retracted)[3]
Barrel length10.5 in[3]
Cartridge9×19mm Parabellum[3]
Actionblowback, closed bolt[3]
Rate of fire700-1000 round/min[4]
Muzzle velocity396 m/s (1300) ft/s)[4]
Effective firing range100 m[3]
Feed system20- and 32-round detachable box magazine[4]
100-round Beta C-Mag

The Colt 9mm SMG, also known as the Colt Model 635 or Colt M635, is a 9×19mm Parabellum submachine gun manufactured by Colt, based on the M16 rifle.[5]

Design details

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.[6] As a closed bolt weapon, the Colt SMG is inherently more accurate than open bolt weapons such as the Israeli UZI.[7]

The overall aesthetics are identical to most M16 type rifles. Changes include a large plastic brass deflector protruding from the rear quarter of the ejection port, and a correspondingly shorter dust cover. 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 with pinned-in blocks to allow the use of smaller 9 mm magazines. The magazines themselves are a copy of the UZI magazine, modified to fit the Colt and lock the bolt back after the last shot.[8]

Variants

Further information on Colt 9mm SMG variants: AR-15 variants

Current Colt production models are the R0635 (RO635) which features a Safe/Semi/Full Auto selective fire trigger group and the R0639 (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 and the Department of Energy.[9]Cite error: Closing </ref> missing for <ref> tag Until early 2010s, there are newer variants, R0991(RO991), R0992(RO992) and R6951 are introduced. The R0991 features Safe/Semi/Full Auto selective fire is constructed with Rail Integration System (RIS) picatinny rails on the flat-top receiver as well as around the barrel which allows the easy mounting of ancillary devices, has 10.5" barrel and equipped with a third generation composite buttstock; The R0992 has almost all the same features to the R0991, except the selective fire mode is Safe/Semi/3-round Burst only; The R6951 has almost all the same features of the R0991 and R0992, but doesn't have selective fire and has a 16.1" barrel instead of the 10.5" one.

A suppressed variant known as the "DEA model" exists that uses an integral Knights Armament Company made suppressor covered with an M16A2 handguard.[10]

In 2025, Harrington & Richardson has released their clone of the Colt 633 SMG.[11][12]

Users

  •  Argentina: Used by the Argentine Army.[13]
  •  Ecuador[14]
  •  India: Used by the Octopus Unit of Andhra Pradesh Police.[15]
  •  Israel: Used by IDF special forces.[16]
  •  Malaysia: Used by the Pasukan Khas Udara (PASKAU) Counter-Terrorism Forces of the Royal Malaysian Air Force[17]
  •  Mexico[18]
  •  Pakistan[19]
  •  United States: Used by the United States Marine Corps,[lower-alpha 1][20][21] United States Marshals Service, Los Angeles Police Department Metro Division SWAT, Federal Bureau of Prisons, Drug Enforcement Administration, Diplomatic Security Service, Department of Energy Federal Protective Forces, and a number of other federal agencies.[22][23]
  • Colt SMG 635 left side
    Colt SMG 635 left side
  • Colt SMG 635 right side
    Colt SMG 635 right side
  • Colt SMG 635, ML 2 Sight, Colt mount, and a magazine
    Colt SMG 635, ML 2 Sight, Colt mount, and a magazine
  • Colt SMG 635, ML 2 Sight, Colt mount
    Colt SMG 635, ML 2 Sight, Colt mount

See also

References

  1. ↑ Gordon L. Rottman (1991). Panama 1989–90. Bloomsbury USA. p. 61. ISBN 1855321564. 
  2. ↑ "War on Drugs". https://www.awesomestories.com/asset/view/War-on-Drugs. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 https://web.archive.org/web/20030610171546/http://colt.com/mil/SMG_2.asp Colt Military Catalog
  4. ↑ 4.0 4.1 4.2 https://web.archive.org/web/20030610090043/http://colt.com/law/SMG.asp Colt Law Enforcement Catalog
  5. ↑ "Colt Weapon Systems". 2003-05-18. http://www.colt.com/mil/SMG.asp. 
  6. ↑ Tarr, James (2013). Standard Catalog of Colt Firearms. Iola, Wisconsin: Krause Publications. p. 237. ISBN 978-1-4402-3747-8. https://books.google.com/books?id=CaxuAAAAQBAJ&pg=PA237. Retrieved 31 August 2016. 
  7. ↑ 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
  8. ↑ Thompson, Leroy (19 May 2016). The M3 "Grease Gun". Bloomsbury Publishing. pp. 141–142. ISBN 978-1-4728-1109-7. https://books.google.com/books?id=uLP1CwAAQBAJ&pg=PT141. 
  9. ↑ Peterson, Philip (2011). Standard Catalog of Military Firearms: The Collector's Price and Reference Guide. Iola, Wisconsin: F+W Media. p. 387. ISBN 978-1-4402-2881-0. https://books.google.com/books?id=aftMDn2bd14C&pg=PA387. 
  10. ↑ "The Colt SMG and Its Many Clones". 5 April 2023. https://gunmagwarehouse.com/blog/the-colt-smg-and-its-many-clones/. 
  11. ↑ McCollum, Ian (2025-01-18). "PSA/H&R Clones the Department of Energy Colt 9mm SMG - Forgotten Weapons" (in en-US). https://www.forgottenweapons.com/psa-hr-clones-the-department-of-energy-colt-9mm-smg/. 
  12. ↑ "PSA Harrington & Richardson Retro DOE Review: Old School Cool" (in en). https://www.pewpewtactical.com/psa-hr-retro-doe-review/. 
  13. ↑ "Algunas armas utilizadas por el actual Ejército Argentino". Aquellas armas de guerra. 5 November 2012. http://aquellasarmasdeguerra.wordpress.com/2012/11/05/algunas-armas-utilizadas-por-el-actual-ejercito-argentino/. 
  14. ↑ Ecuatoriana, Fuerza Aérea. "El Grupo de Operaciones Especiales de la Fuerza Aérea #GOEFA, realizó reentrenamientos de navegación terrestre, descensos y polígono de tiro en diferentes cantones de la provincia del #Guayas, esta actividad permite fortalecer las capacidades operativas de las". https://x.com/FuerzaAereaEc/status/1339964166136803330. 
  15. ↑ "Sabitha's day out with latest weapons of Octopus". The New Indian Express. http://www.newindianexpress.com/cities/hyderabad/article234835.ece. 
  16. ↑ "PALSAR Golani operator posing with a Colt 9mm SMG. The weapon is fitted with a sound suppressor and a forward grip.". http://www.isayeret.com/content/weapons/smg/coltsmg/article.shtml. 
  17. ↑ "PASKAU Malaysian Special Air Service Weapons". Military Factory. http://www.militaryfactory.com/smallarms/paskau-malaysian-air-force-special-forces-weapons.asp. 
  18. ↑ "Caen 4 sicarios cuando se dirigían a ejecutar a una persona; llevaban narcomensaje para dejarlo con el cuerpo" (in es-us). La Opinión. 9 September 2022. https://laopinion.com/2022/09/09/caen-4-sicarios-cuando-se-dirigian-a-ejecutar-a-una-persona-llevaban-narcomensaje-para-dejarlo-con-el-cuerpo/. 
  19. ↑ "Pakistan Infantry Arms List (Current and Former Types)". https://www.militaryfactory.com/smallarms/by-country.php?Nation=Pakistan. 
  20. ↑ "9 Millimeter Submachine Gun NSN 1005-01-575-5656". https://nationalstocknumber.org/nsn/1005-01-575-5656. 
  21. ↑ "MARINE CORPS SECURITY GUARD BATTALION TRAINING AND READINESS MANUAL". http://marines.mil/news/publications/Documents/NAVMC%20DIR%203500.90.pdf. 
  22. ↑ "Chuck Taylor's ASAA -THE COLT M635 9mm SUBMACHINE GUN". http://www.chucktayloramericansmallarmsacademy.com/coltm635.html. 
  23. ↑ McCollum, Ian (2025-01-18). "PSA/H&R Clones the Department of Energy Colt 9mm SMG - Forgotten Weapons" (in en-US). https://www.forgottenweapons.com/psa-hr-clones-the-department-of-energy-colt-9mm-smg/. 

Notes

  1. ↑ R0991 has an NSN 1005-01-575-5656

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