Colt LE6921 SOCOM 5.56mm Upper Receiver Conversion Kit | 14.5" Barrel

The Colt LE6921SOCOMCK M4A1 Upper Receiver Conversion Kit is a complete centerfire upper receiver group chambered in 5.56mm NATO, engineered to match the early Global War on Terror (GWOT) deployment configuration of the U.S. military’s M4A1 SOCOM battle rifle. This highly collectible factory kit provides a drop-in option to convert any standard AR-15 lower receiver into a milestone-correct, mil-spec tactical weapon system.

It features a true 14.5-inch chrome-lined, button-rifled SOCOM heavy barrel with a 1:7" right-hand twist rate, a standard carbine-length direct gas impingement system, a fixed A2 front sight tower with integrated bayonet lug, and a side sling swivel. The kit is upgraded with military-contract components, including a genuine Knights Armament Company (KAC) RAS quad-rail handguard with polymer rail covers and a premium mil-spec MaTech folding backup rear iron sight (BUIS).

Package includes:

• Complete M4A1 SOCOM-pattern upper receiver group
• Chrome-lined head-spaced mil-spec bolt carrier group (BCG)
• Standard charging handle
• KAC RAS quad-rail handguard with panels
• MaTech folding rear iron sight
• Box and manual

Specifications:

• Barrel Length: 14.5 inches
• Barrel Thread Pitch: 1/2"x28 TPI
• Overall Length: 22.75 inches
• Weight: 4.85 pounds
• Condition: New

An authentic Colt factory conversion kit ideal for collectors and builders seeking a historically accurate GWOT-era M4A1 SOCOM upper.