The Colt LE6933 EPRII PRO Upper Receiver Conversion Kit is a complete centerfire upper assembly chambered in 5.56mm NATO, modernizing Colt's legendary short-barreled Commando line with contemporary, duty-grade tactical enhancements. This factory-assembled kit provides a direct, plug-and-play solution to convert any standard AR-15 lower receiver group into an Enhanced Patrol Rifle (EPR) Gen II PRO short-barreled platform. It features a compact 11.5-inch chrome-lined, button-rifled premium carbon steel barrel with a 1:7" right-hand twist rate and a direct gas impingement system housed within a 10.5-inch free-floating aluminum M-LOK handguard that isolates the barrel from hand pressure to maximize shot-to-shot accuracy. Heavily upgraded with high-performance components right out of the box, the PRO package integrates a premium Radian Raptor ambidextrous charging handle, an elite ambidextrous safety selector switch, and folding, low-profile all-steel Magpul MBUS Pro iron sights. Colt LE6933EPRII-PRO 5.56mm 11.5" Bbl Sights Matte Black Upper Receiver Conversion Kit LE6933-EPRII-PRO-CK