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] 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] .

Colt Model 633从编号上看似乎早于635型，其实反过来，633型是基于635型而设计的缩短型，这个型号大概在1990推出，据说最初是为DOE（药物管理局）需要的一种更紧凑的近距武器，让它小到可以藏在运动包中。

Colt R0633 9mm Submachine Gun. Often described as the ‘DOE Colt’, after a Department of Energy contract for submachine guns, the R0633 is a 9x19mm submachine gun based on the M16. The prototype, designated Model 0633, used a one-piece aluminium foreguard, however, Colt replaced this with the handguard from the M231 Firing Port Weapon.

2008年8月5日 · By using modern high performance jacketed hollow point ammunition the 9mm NATO cartridge was quite effective and did not suffer from the over penetration and lack of stopping power as the military ball round. The SMG offered SWAT teams a significant amount of firepower in a small package.

2021年4月8日 · Colt presented them with the R0633 or DOE SMG contract gun. The Department of Energy wanted a short and light SMG that could be used in the confined spaces of nuclear facilities and inside vehicles. One of the DOE teams was the Office of Secure Transportation which guards nuclear materials during transport.

2021年11月25日 · My original plan was to build a 10.5 inch barrel Colt 635 after my plans to make a CAR15 clone narrowly lost out to a DMR type build. While scouring online for a used 635 type upper, I ran across the 633 type upper you see here for not too much more from a private seller.

2023年3月22日 · My NFA registered 9mm Colt 633 clone as used by the Department of Energy to guard Nuclear plants and shipments. This example is semi-auto only. The weapon is select fire with a 3-position selector switch. The prototype model had ambidextrous controls, however, the production model lacked this feature.

2016年10月1日 · Colt still offers their 9mm/M16 submachine gun in their military and law enforcement catalogs. The submachine guns have been updated with a third generation composite collapsible buttstock, flat-top receiver, and handguards featuring a modular rail system for mounting a variety of optics and accessories and a 10.5-inch barrel.

2024年5月11日 · The Colt R0633 upper receiver, if you can find one, will cost you anywhere from $2,000 to $3,000. Anyway, check out my video linked below if you are interested in seeing the details of the Colt R0633 9mm SMG upper receiver and the …

The Colt 633, a rather odd 9mm carbine with 7 inch barrel and uzi magazine, it was employed by the DOE to protect nuclear plants. God these are so interesting to me, it’s one of my hopeless dream guns. You can still find clone uppers pretty regularly. There were a few on GAFS this year already. You can also build em from scratch.