Colt M4 LE6933 Upper | 11.5 in. | .223/5.56

The Colt M4 LE6933 is a complete AR-platform upper assembly built for compact handling and consistent operation. It is chambered for .223 Rem / 5.56 NATO and features an 11.5-inch chrome-lined barrel with a 1:7 twist rate. The assembly ships as a flat-top upper and includes a complete bolt carrier group, charging handle, and adjustable iron sights for immediate installation on a compatible lower.

Typical applications include range training and short-barrel competition or other lawful, range-focused AR builds that prioritize maneuverability and reliability. This upper is intended for use in compliant, legal configurations and regular maintenance to preserve performance.

Product Specifications

• The product type is listed as a Upper for AR-platform rifles.
• The subcategory is Complete Upper Receivers.
• The finish is specified as Anodized.
• The color is Black.
• The barrel is described as 11.5 inches and chrome-lined for extended service life.
• The barrel type is listed as Lightweight.
• The cartridge/chambering is .223 Rem / 5.56 NATO.
• The rate of twist is listed as 1:7.
• The muzzle threading is 1/2-28.
• The contour is listed as Carbine.
• The style is specified as a Complete upper assembly.
• The make/model platform is identified as AR-15.
• The unit includes a bolt carrier assembly, charging handle, and adjustable iron sights as standard components.
• The UPC is 098289035349.

Built to Colt’s established manufacturing standards, this complete upper pairs a short, chrome-lined barrel with a direct gas system and a flat-top receiver to offer a compact, serviceable component for AR builders and range-focused shooters. Its included bolt carrier group and sights reduce the need for immediate secondary purchases and make it suitable for builders who want a ready-to-install upper for lawful, compliant use.