Colt M4 LE6921EPR 14.5in 5.56 NATO Upper w/ BCG

Description

The Colt M4 LE6921EPR upper group is a complete AR-15 upper assembly built around a 14.5-inch barrel and chambered for .223 Rem/5.56 NATO. This kit ships with a bolt carrier group and features a matte black finish designed for utility and longevity. The 1:7 rate of twist supports a broad range of projectile weights, and the muzzle is threaded 1/2-28 for compatibility with common muzzle devices. It is intended for shooters assembling or upgrading AR-15 platform rifles for range use, competition, or duty-style applications.

Key Specifications

• The barrel measures 14.5 inches for a compact profile.
• Chambered in .223 Rem/5.56 NATO.
• The finish is matte for reduced glare.
• The exterior color is black.
• The rifling has a 1:7 rate of twist.
• The muzzle features 1/2-28 threading.
• Configured as a complete upper assembly.
• Platform make/model listed as AR-15.

This Colt upper provides a durable, ready-to-install foundation for a wide range of AR-15 builds. With a serviceable barrel length, proven twist rate, and a complete bolt carrier group included, it is well suited for shooters who value reliable components and straightforward integration into existing lowers. The matte black finish and standard muzzle threading make this upper adaptable to many common accessories and configurations.