The Colt LE6921 (brand part no. LE6921CK-NHG) is a fully assembled AR-15 upper receiver built around a 14.5-inch barrel cut with a 1:7 rifling twist, the twist rate most 5.56 NATO/.223 Remington AR-15 barrels use. It comes to you already assembled with a bolt carrier group and charging handle installed, so it drops onto a compatible AR-15 lower without any additional parts sourcing. This is an AR15 upper only — no lower receiver is included.

Key Specifications

• Barrel measures 14.5 inches in length.
• Cut with a 1:7 twist rate, the standard twist for 5.56 NATO/.223 Remington AR-15 barrels.
• Sold fully assembled, complete with bolt carrier group and charging handle installed.
• Sold as an upper receiver group only — no lower receiver, stock, or grip is included.

Frequently Asked Questions

Does this include a lower receiver? No. This is a complete upper receiver group only; you’ll need your own compatible AR-15 lower to build a complete rifle or pistol.

Does a 14.5-inch upper make my rifle an NFA short-barreled rifle? Only once it is assembled onto an already-shouldered, complete rifle lower without a barrel of at least 16 inches. Mounting this upper on a shouldered rifle lower without a prior ATF Form 1 approval to build an SBR would create an unregistered short-barreled rifle; building it as a pistol on a compatible pistol lower avoids that concern entirely.

Buy the Colt LE6921 Upper Receiver, 14.5in Barrel w/ BCG & Charging Handle

A factory-assembled Colt upper with the BCG and charging handle already installed saves you the trouble of sourcing and fitting those parts separately. Order this from a Lubbock, TX gun shop and our team will get your order processed right away.