# 4097281

Colt 9mm SMG in "Model 633" Configuration, Class III/NFA Fully Transferable Machine Gun, with Extra Upper Receiver Assembly

$ 119999.99

A distinctive Colt Model 633 SMG with strong law-enforcement and federal-agency collector appeal, this carbine stands out for its AR-15-based design, specialized configuration, and association with Department of Energy and Drug Enforcement Agency contracts.

Developed in 1985, the Colt SMG was created for the American law enforcement market as a domestic alternative to the Israeli Uzi and German MP5
Built on Colt’s AR-15 rifle platform, making the controls and operation nearly identical to the familiar AR-style system
Designed as a straight-blowback, pistol-caliber automatic carbine—a simple and proven operating system well suited to compact shoulder-fired firearms
Model 633 configuration:
- Uses a slightly shorter barrel than the standard Colt SMG
- Features a different front sight and handguard arrangement
- Chiefly associated with Department of Energy and Drug Enforcement Agency contracts, adding meaningful federal-service provenance and collector interest
Sight system:
- Folding post front sight
- Two-leaf rear sight
Forearm and front-end features:
- Truncated round forearm
- Steel plate hand stop installed at the end of the forearm
Magazine well:
- Pinned-in two-piece adapter block installed in the magazine well
Controls and receiver features:
- Right-handed “SAFE/SEMI/AUTO” selector switch
- A1-pattern upper receiver
- No forward assist
- Extended plastic case deflector
Furniture:
- Checkered pistol grip
- Two-position telescoping buttstock
Included extra upper receiver:
- 10-inch barrel
- A1-pattern flash hider
- Bayonet lug
- Ribbed round handguard

With its specialized Model 633 features, AR-family handling, federal-agency associations, and included extra upper receiver, this Colt SMG offers notable desirability for collectors focused on modern U.S. law enforcement and government-contract firearms.

Condition

Excellent overall, with 97% plus original matte black phosphate finish, showing some light scratches and handling marks on the metal and furniture. Mechanically excellent. NOTE: This weapon is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 479.