Colt Defense LE6920 M4 Carbine 5.56 NATO, 16 in Barrel, 1:7 Twist, Quad-Rail, Matte Black
This Colt Defense LE6920 M4 Carbine stands out with its Colt Defense-marked lower bearing the "M4 CARBINE" rollmark and LE-prefix serial range. It is built on the AR-15 platform and features a flat-top upper with a T-marked MIL-STD-1913 rail, a 16 in M4/Government-profile barrel with M203 cut, and a carbine-length gas system. A two-piece drop-in quad-rail and a flip-up rear sight are installed, and the bore is bright and clean.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are visible handling and use marks on exterior surfaces. See photos for details.
What’s Included
- Flip-up rear sight (installed)
- Two-piece drop-in quad-rail handguard (installed)
- 1x 30-round USGI-pattern aluminum magazine marked '6M9N8 MADE IN USA'
The rifle is configured with a Colt Defense-marked lower and "M4 CARBINE" rollmark, reflecting its LE-prefix serial range. The aluminum alloy receivers wear a matte black finish and the build is made in the USA.
The 16 in M4/Government-profile barrel includes the M203 cut and a threaded muzzle with an A1‑style birdcage flash suppressor featuring 360° slots. It is chambered in 5.56mm NATO with a 1:7 twist to support common duty and training loads. The barrel shows Colt proof details including the CAGE code 13629 and M P stamp.
Sighting equipment consists of a fixed, pinned A-frame front sight base with bayonet lug paired with a flip-up rear sight on the receiver rail. The flat-top upper has a T-marked MIL-STD-1913 rail, and the installed two-piece drop-in quad-rail handguard provides numbered Picatinny slots for accessory placement.
The carbine-length gas system drives a gas-operated, direct-impingement action. Furniture includes a six-position, collapsible M4-style stock with a 13.5 in length of pull and an A2 pistol grip. Capacity is 30+1 when using the included USGI-pattern 30-round magazine.