Description
Plenty of folks buy a factory AR and immediately strip off the handguard, stock, and rear sight to put on the parts they wanted in the first place. Colt built the LE6920-OEM2 for exactly those people. It's the proven LE6920 M4 Carbine underneath, minus the furniture, so you start with a real Colt core and finish it your way without a pile of takeoff parts collecting dust in a drawer.
What Makes the LE6920-OEM2 Worth Building On
The heart of this rifle is the same 16.1 inch chrome-lined barrel that made the LE6920 a household name, with a 1:7 twist that stabilizes everything from light varmint loads to heavy 77 grain match ammo. The gas system runs direct impingement with a low-profile gas block instead of the traditional A2 front sight tower, and Colt skips the handguard retaining ring entirely. That combination means most free-float handguards that work with a standard USGI barrel nut slide right on, no wrench fights or gas block swaps required. Up top you get a flat top upper with a Picatinny rail, so mounting a red dot, LPVO, or backup irons is straightforward.
Colt M4 OEM2 Fit, Finish, and Details
Receivers are forged aluminum with a matte black finish, and the fit between upper and lower is what you'd expect from Hartford. An A2 pistol grip and Colt's mil-spec trigger group come installed, and the rifle wears an A2 flash hider on the muzzle. Overall length runs 32 inches with the buffer tube in place, waiting on whatever stock you prefer.
Finishing Out Your OEM2 Carbine
Plan on adding a stock, handguard, trigger guard, rear sight or optic, and magazines to complete the rifle. That short shopping list is the whole point. You get Colt quality where it matters most, in the barrel, bolt carrier group, and receivers, and total freedom everywhere else. For a home defense carbine, a range gun, or a duty-style build, this is one of the smartest starting points on the wall.
Key Specifications
- Manufacturer: Colt's Manufacturing
- Model: M4 Carbine OEM2
- Manufacturer Part Number: LE6920-OEM2
- UPC: 098289020253
- Caliber: .223 Rem / 5.56 NATO
- Action: Semi-Automatic, Direct Impingement
- Barrel Length: 16.1", Chrome-Lined
- Twist Rate: 1:7" Right Hand
- Gas Block: Low Profile (No Handguard Retaining Ring)
- Upper Receiver: Flat Top with Picatinny Rail
- Muzzle Device: A2 Flash Hider
- Grip: A2 Pistol Grip
- Overall Length: 32"
- Finish: Matte Black
- Furniture: Not Included (Stock, Handguard, Rear Sight, Trigger Guard, Magazine Omitted)
What’s Included
- Colt LE6920-OEM2 carbine with A2 pistol grip installed
- Low-profile gas block, gas tube, and USGI barrel nut installed
- Colt factory box and documentation
Frequently Asked Questions
What parts do I need to add to finish the Colt LE6920-OEM2?
You'll need a buttstock, handguard, trigger guard, rear sight or optic, and magazines. Everything else, including the barrel, bolt carrier group, gas system, pistol grip, and trigger, comes installed from the factory. Most builders can have it range-ready in an afternoon with basic armorer tools.
Will a free-float handguard fit the LE6920-OEM2 without modification?
That's the whole idea behind this model. Colt installs a low-profile gas block and leaves off the handguard retaining ring, so most free-float handguards designed around a standard USGI barrel nut will mount right up. Just confirm your chosen handguard is compatible with a mil-spec barrel nut before ordering.
What ammo works best with the 1:7 twist barrel?
The 1:7 twist is one of the most versatile rates on an AR and handles a wide spread of bullet weights. It really shines with heavier 62 to 77 grain loads, but it shoots common 55 grain range ammo just fine too. The chamber accepts both 5.56 NATO and .223 Remington, which keeps your options wide open.
Is this the same quality as a standard Colt LE6920?
Yes. The OEM2 uses the same chrome-lined 16.1 inch barrel, forged receivers, and mil-spec internals as the regular LE6920 M4 Carbine. Colt simply omits the furniture so you're not paying for parts you plan to replace, which makes it a favorite among people building a customized rifle on a proven foundation.






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