Colt M4 Upper 5.56 11.5in Lightweight Black

The Colt M4 LE6933 is a complete upper receiver group built around an 11.5″ lightweight barrel. Chambered for .223 Rem / 5.56 NATO with a 1:7 rate of twist, this upper is finished in anodized black and configured on the AR-15 platform. The package name indicates it ships with a bolt carrier group (BCG) and iron sights, providing a ready-to-install assembly for range, duty, or training use.

Key Specifications

• The barrel length measures 11.5 inches.
• The barrel type is Lightweight.
• The cartridge is .223 Rem / 5.56 NATO.
• The rate of twist is 1:7.
• The muzzle thread is 1/2-28.
• The finish is Anodized.
• The contour is Carbine.
• The color is Black.
• The package is a complete upper group and the product name specifies inclusion of a BCG and sights.
• The platform designation is AR-15.

Designed and built with Colt components and manufacturing standards, this upper delivers a compact, service-oriented configuration suitable for precision at shorter ranges and practical training. Its lightweight carbine contour and ready-to-install assembly make it a straightforward upgrade for users seeking a dependable, factory-built upper group for the AR-15 platform.