Colt LE6920 M4 Carbine 5.56 NATO, 16 in M4 Profile, 1:7 Twist, Threaded Barrel, AR-15
This Colt LE6920 M4 Carbine is a 5.56 NATO, AR-15 platform carbine with a 16-inch M4-profile barrel, 1:7 twist, and a threaded muzzle with an A2 birdcage flash suppressor. It features a flat-top upper with T-marked rail positions, an F-marked front sight base with bayonet lug, and a carbine-length gas system. The bore is in excellent condition, and the rifle comes with a flip-up rear sight and a 30-round Magpul PMAG.
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: Light handling marks are present on exterior surfaces. Please refer to the photos for detailed views.
What’s Included
- Flip-up rear sight (installed)
- Ring-type sling loop mounted forward of the handguard cap (installed)
- Short Picatinny accessory rail segment on the 6 o'clock of the handguard (installed)
- 1x 30-round Magpul PMAG magazine
The LE6920 configuration delivers a classic M4-style setup with a direct-impingement action, carbine-length gas system, and flat-top upper receiver. The upper is T-marked (T2–T12), and the rifle includes a forward assist and ejection-port cover. It uses the STANAG-pattern magazine interface with a stated capacity of 30+1 rounds.
The 16-inch M4-profile barrel includes the M203 step and a 1:7 twist rate to stabilize a wide range of 5.56 NATO projectiles. The muzzle is threaded and fitted with an A2 birdcage flash suppressor. Barrel markings include "C MP 5.56 NATO 1/7."
Sighting is handled by an A2 F-marked front sight base with bayonet lug and front sling swivel, paired with a flip-up aperture rear sight. The flat-top receiver’s T-markings aid in repeatable accessory placement without guessing positions.
Furniture includes a 6-position telescoping stock (10.0 in length of pull), an A2-style polymer pistol grip, and a carbine-length ribbed polymer two-piece handguard. A short accessory rail segment is installed at the 6 o'clock on the handguard, and a ring-type sling loop is mounted forward of the handguard cap.
Construction details include matte black anodized aluminum receivers and visible castle nut staking. The overall finish is matte black. The rifle was made in the United States, and the front sight base is F-marked, consistent with the flat-top receiver height.