Colt LE6944P 5.56mm 14.5" Bbl Piston One Piece Matte Black Upper Receiver Conversion Kit LE6944PCK

The Colt LE6944P Monolithic Piston Upper Receiver Conversion Kit is a complete centerfire upper assembly chambered in 5.56mm NATO, uniquely integrating a short-stroke gas piston operating system into a monolithic short-barreled configuration. Utilizing Colt's proprietary Advanced Articulating Link Piston (ALP) system, this kit drastically reduces inner receiver stress, heat, and carbon fouling by venting gasses forward at the block. The patented one-piece monolithic quad-rail handguard is machined from a single aluminum forging to completely free-float the barrel, ensuring consistent match-grade accuracy and optics zero retention under rigorous field conditions.