COLT LE6940 | M4 Monolithic Carbine | 5.56 NATO | 16.1″

The Colt LE6940 is a monolithic M4-style carbine built around a continuous Mil-Spec rail and a free-floating chrome-lined barrel. It is a semi-automatic rifle configured for optical mounting and accessory use, supplied with Magpul MBUS backup sights and a folding front sight for optic clearance. A Vortex Strike Eagle 1-6×24 or similar 1-6x optic (under $1,000) pairs well for practical target work and low-to-mid-range precision on this platform.

Product Specifications

• The action is Semi-Auto.
• The caliber is listed as .223 Rem / 5.56 NATO.
• The barrel length is 16.1 inches.
• The barrel is described as chrome-lined with a black finish.
• The rate of twist is 1:7 RH.
• The receiver is a one-piece monolithic upper finished in matte black and constructed from 7075 T6 aluminum.
• The handguard is a continuous Mil-Spec quad rail providing full-length accessory mounting.
• The stock is a 4-position collapsible synthetic stock in black.
• The sights are Magpul MBUS flip-up rear and a folding front sight for optic clearance.
• The muzzle device is an A2 flash hider.
• The operating system is direct gas impingement.
• The trigger is described as a single-stage / standard trigger.
• The overall length is listed as 32 to 35.5 inches (adjustable stock).
• The weight is not consistently reported and requires verification.
• The UPC is 098289019349.

The LE6940 is oriented toward users who need a repeatable, optics-friendly AR platform with extensive rail real estate for mission-specific accessories. Its monolithic upper helps maintain zero when swapping or relocating optics, and the chrome-lined free-floating barrel supports a wide range of factory ammunition. Typical lawful applications include practical target shooting and patrol or training use where repeatable optics alignment and rugged accessory mounting are priorities.

The LE6940’s one-piece monolithic rail and accessory-ready configuration make it a practical choice for shooters who value modularity and consistent optic placement across extended use.

Users commonly praise the platform’s reliability and the monolithic rail’s repeatable optics mounting.

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