The Colt LE6933 Commando Upper Receiver Conversion Kit is a complete centerfire upper assembly chambered in 5.56mm NATO, replicating the compact, time-tested short-barreled configuration of Colt’s legendary Commando series. This factory kit provides an immediate, plug-and-play solution to convert any standard AR-15 lower receiver group into a highly maneuverable, close-quarters tactical deployment weapon system. It features an 11.5-inch chrome-lined carbon steel barrel equipped with a 1:7" right-hand twist rate, a direct gas impingement operating system, a mil-spec fixed A2 front sight tower with an integrated bayonet lug, and a dual-layer polymer drop-in double-heat-shield handguard.