The HiStory

Build Log:

COLT DOE

Model 633

The 633 has a rather obscure history being adopted in limited numbers officially by the DOE and in VERY limited unofficial numbers by the DEA. It had a 7 inch barrel compared to the 10.5 inch used on the 635, handguards borrowed from the Colt Port Firing Weapon, unique to it front sight post and hand stop, A1 style carry handle upper receiver modified with a gas deflector, A2 style lower receiver with a 9mm conversion insert pinned into the magwell, and a CAR15 style stock with 2 position buffer tube and a heavyweight buffer with spacer. Magazines were based on Uzi mags with an extra notch cut in them to work with the AR15 mag release button. The 633 competed with the H&K MP5k for a DOE contract in the 80s with the Colt winning out.

Caliber - 9x19 NATO

Overall Length - 21 Inches / 53.3cm

Weight - 6 LBS / 2.72 Kg

Notes: Loaded - 32 Round Magazine

Parts Specifications:

Barrel

9MM Barrel

Length - 7.5 Inches

Profile - Lightweight

1:10 Rifling Twist

Manufacturer - Harrington & Richardson

Notes: 1/2x28 Thread

Muzzle Device‍

Thread Protector

Manufacturer - Harrington & Richardson

Notes: 9MM; 5/8×24 Thread

Upper Receiver‍

Slickside 9MM M16 Upper Receiver‍‍

Manufacturer - Harrington & Richardson

Charging Handle

Milspec AR-15 Charging Handle

‍Manufacturer - Harrington & Richardson

Bolt Carrier Group

9MM Bolt Carrier Group

Manufacturer - Harrington & Richardson

Handguard

DOE Handguard

Manufacturer - Harrington & Richardson

Lower Receiver‍

Stealth Lower Receiver

Manufacturer - Palmetto State Armory

Notes: A2 Profile

Magwell Adapter

Colt 9MM Magwell Adapter

Manufacturer - KAK Industry

Fire Control Group

Milspec Fire Control Group

Manufacturer - KAK Industry

Lower Parts Kit

AR-15 Milspec Lower Parts Kit

Manufacturer - KAK Industry

Stock & Receiver Extension Assembly

Aluminum CAR-15 Stock

Carbine Length Buffer Tube

Carbine Length Buffer Spring

Manufacturer - Harrington & Richardson

Buffer

9MM Extended Buffer

Manufacturer - KAK Industry

Notes: Buffer Weight: 8 oz

Pistol Grip‍

A1 Grip

Manufacturer - Linemount

Magazine

Colt Style 32-Round Magazine

Manufacturer - ASC

Attachments / Accessories

Stock Buttpad

CAR-15 Recoil Pad

Manufacturer - John Masen

Sling

USGI GP Strap

Colt SMG 9MM Speed Loader

Manufacturer - Maglula

Tools Used / Recommended Tools

Bench Vice

Notes: Needed for holding receivers in place during assembly.

Upper Receiver Rod

Notes: Keeps barrel secure while torquing barrel nut(very important), installing muzzle devices and keeps upper receiver stable while installing sights/optics.

Lower Receiver Vise Block

AR-15 Armorer's Wrench

Notes: Needed for barrel nut and buffer tube installs, helps with muzzle devices that are compatible.

Torque Wrench

Notes: Needed for installation of barrel nut.

Pin Starter Punch Set

Notes: Helps with installing trickier roll pins such as bolt catch or trigger guard.

Pin Punch Set

Center Punch Set

Notes: Needed for staking endplates / castle nuts on carbine buffer tubes.

Takedown Pin Install Tool

Notes: Greatly decreases the difficulty of installing front takedown pins without losing detents / springs.

3/16" Hex T-Handle Wrench

Notes: Allows easy access for removal & installation of pistol grips ensuring proper torque for installation.

A list of parts and tools used can be found below. For those who want to build their own Colt SMG.