Colt LE6940 M4 Carbine 5.56 NATO 16.1″ Quad Rail Semi-Auto Rifle

The Colt LE6940 is a professional-grade M4 carbine built to the standards that have made Colt the benchmark for AR-platform rifles. Chambered in .223 Rem/5.56 NATO with a 16.1-inch barrel, this semi-auto rifle ships quad-rail ready and equipped with Magpul MBUS backup iron sights — making it a capable platform straight out of the box for home defense, patrol, or serious range work.

Key Specifications

• The rifle is chambered in .223 Rem / 5.56 NATO for wide ammunition compatibility.
• The barrel measures 16.1 inches with a black finish for corrosion resistance and a low-profile appearance.
• A rate of twist of 1:7 inches optimizes stability with heavier projectiles.
• The action is semi-automatic for reliable, consistent performance.
• The rifle includes a quad rail handguard for mounting lights, lasers, grips, and other accessories.
• Magpul Backup Flip Sights (MBUS) are included for dependable iron-sight capability.
• The magazine capacity is 20+1 rounds, with one 20-round magazine included.
• The safety is a standard lever-action type consistent with mil-spec AR controls.
• The overall color is matte black throughout.
• Manufacturer part number is LE6940, produced by Colt.

The LE6940 represents Colt’s commitment to building rifles that perform when it counts. The integrated quad rail opens the door to a fully customized optics and accessory setup, while the 1:7 twist barrel and MBUS sights ensure you’re combat-ready before you add a single upgrade. Whether this is your first Colt or the latest in a long line, the LE6940 delivers the fit, finish, and reliability that the Colt name demands.