ProMag AR-15/M16 9mm Luger Quick Change Magazine Adapter Block- Polymer

The ProMag PM237 is a magazine block adapter which easily installs in a standard Ar-15 lower receiver to allow the use of 9mm Colt SMG pattern magazines. This is the key component that you must have in order to make your AR-15 9mm conversion work. The block is constructed of high strength polymer.  

Specifications and Features:

• Converts from standard AR-15 lower to 9mm AR-15 lower
• Allows for use of 9mm Colt SMG magazines
• Made from high strength polymer
• Standard Pattern AR-15 lower receivers