Genuine Colt 9mm AR-15/M16 magazine well adapter converts standard AR-15/M16 lowers for use with Colt 9mm Upper Receivers. Accepts Colt 9mm style magazines, such as those from Metalform or Brownells. Includes ejector and feedramp. Adapter is machined from aluminum, with steel hardware and components. Receiver modification is required for installation. Mfg: Colt
