COLT LE6921 5.56 14.5″ 30RD BLK SBR

Description

The Colt LE6921 is built around the same geometry and controls as the M4 carbine platform, making it a natural fit for shooters who want a compact, familiar AR-pattern rifle for close-quarters work, home defense, or range use. The receiver is roll-marked LE M4, consistent with Colt’s law enforcement production lineage rather than the civilian LE6920 line, and the two share the same serial number series while differing primarily in barrel length.

The 14.5-inch barrel shortens the overall package meaningfully compared to a standard 16-inch carbine, which reduces the moment of inertia when moving through confined spaces — the rifle handles differently in the shoulder when transitioning or pivoting, not just when measured on a bench. The tradeoff is a modest reduction in muzzle velocity compared to longer-barreled variants of the same chambering, though .223 Rem/5.56 NATO still produces adequate terminal performance at realistic engagement distances from this length. The 1:7-inch twist rate — shared with the LE6920 — stabilizes heavier projectiles effectively, giving handloaders and ammunition selectors room to work with 62-grain and heavier loads without sacrificing the ability to run lighter bullets. The rifle ships with a 30-round magazine and operates on a direct-impingement gas system, the proven mechanism Colt has used on military and law enforcement contracts for decades. Dwell time at 14.5 inches runs shorter than on a 16-inch carbine-length setup, which tends to produce a slightly snappier but not unmanageable recoil impulse with standard-pressure ammunition.