Colt LE6921 Upper Receiver Group (14.5″)

Colt M4 Carbine 14.5″ Complete Upper Receiver Assembly

Bring authentic military heritage to your build with this genuine Colt M4 Carbine 14.5″ Complete Upper Receiver Assembly. Manufactured by Colt to military specifications, this upper delivers the reliability, durability, and performance that made the M4 platform the standard for U.S. service rifles.

Featuring a chrome-lined 14.5-inch barrel with a 1:7 twist rate, this upper is optimized for a wide range of 5.56 NATO ammunition. The flat-top upper receiver provides a solid mounting platform for modern optics while retaining compatibility with standard backup iron sights.

The carbine-length gas system offers the classic M4 operating characteristics, while the fixed A2 front sight base and M4 feed ramps ensure dependable function under demanding conditions. Whether you’re completing a clone-correct military-inspired rifle, replacing a worn upper, or looking for a proven Colt assembly, this upper delivers legendary Colt quality.

Specifications:

• 5.56 NATO 14.5″ Chrome Lined Barrel
• Colt Spec CrMoV Steel, Manganese Phosphate Finish, Chrome-Lined, HP/MPI Tested
• 1:7 RH, 6 Groove
• MIL-SPEC Forged 7075-T6 Aluminum
• MIL-SPEC Matte Black Type-III Hard Coat Anodize
• MIL-SPEC Chrome-Lined / Manganese Phosphate Finish, HP/MPI Tested Bolt
• Includes Mil Spec Charging Handle
• Magpul Flip Up rear iron sight included
• NOT Pinned and Welded, NFA rules apply to use