ProMag PM237B Magazine Quick Change Adapter Block made of Polymer with Black Finish for 9mm Mags to fit AR15 Lower Receiver UPC: 708279013805

Year after year, ProMag has increasingly become one of the leading manufacturers of firearms magazines in the world. Gun enthusiasts and law enforcement personnel have agreed, be it for recreational "plinking", competition shooting, or law enforcement, Promag is the source you can count on. br /br /This is ProMag's 9mm Magazine Adaptor Block. It easily installs in AR-15 lower-receivers and allows the use of 9mm Colt SMG in Colt pattern 9mm upper-receivers. The block is constructed of high a strength polymer with steel hardware, roller, ejector, and bolt stop. br /br /Specifications:br /br /- Fits: Standard AR-15 Magwellbr /- Material: Constructed of high a strength polymerbr /- Caliber: 9mmbr /- Steel hardwarebr /- Roller, ejector, and bolt stopbr /- Color: Matte Black Finish