TacFire's Colt Magazine Magwell Adapter allows for easy conversion of from any standard 223/5.56 lower receiver to 9mm Luger. It features a drop-in design with steel feed ramps and without disassembly of the bolt catch. The magwell adapter is constructed of 6061-T6 aluminum with an anodized finish. This model is compatible with Colt SMG and Uzi firearms. It has a black finish.