Colt LE6920 M4 Carbine 5.56 NATO AR-15 — State Compliant, Pinned and Welded Three-Port Brake to 17.75 inches, Fixed Magpul MOE Stock, 10+1, A2 Front Sight, Flip-Up Rear, 1:7 Twist
This Colt LE6920 M4 Carbine is a state-compliant 5.56 NATO AR-15 configured with a pinned and welded three-port muzzle brake that extends the 16-inch barrel to approximately 17.75 inches, plus a fixed Magpul MOE Carbine stock. It retains the classic M4 layout with a flat-top Picatinny upper, A2 front sight base, carbine-length gas system, and flip-up rear sight. It includes three 10-round magazines for a declared 10+1 capacity.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minimal markings from previous handling and use. The bore is bright and clean. Refer to the photos for additional detail.
What’s Included
- Colt LE6920 M4 Carbine 5.56 NATO rifle
- Three 10-round ProMag ROLLERMAG RM-10 polymer magazines
This LE6920 features a compliance setup with a fixed stock and a permanently attached three-port muzzle brake. The 16-inch M4-profile barrel is brought to approximately 17.75 inches overall length by the pinned and welded brake. The barrel is marked "13629 M P 5.56 NATO 1/7," showing the Colt CAGE code, magnetic particle proof, chambering, and 1:7 twist.
The upper is a flat-top Picatinny receiver with T-marked slots (T4–T12 visible), paired with an A2 front sight base that includes a sling swivel and a flip-up aperture rear sight. A carbine-length, two-piece ribbed polymer handguard and a carbine-length gas system complete the M4 carbine configuration.
Forged aluminum receivers with a hard-anodized finish anchor the build. The lower carries the Colt Defense roll mark and an LE-prefix serial, consistent with LE6920 M4 Carbine production. Controls include a manual safety, and the barrel is threaded under the permanently attached brake.
Furniture consists of a fixed Magpul MOE Carbine stock (12.0-inch length of pull) and an A2-style polymer pistol grip. Declared maximum capacity is 10+1, and the rifle ships with three 10-round ProMag ROLLERMAG RM-10 magazines. This state-compliant configuration delivers the familiar Colt M4 handling with pinned-and-welded 16 to 17.75 inch barrel assembly, iron sights, and a durable hard-anodized finish.