![PROMAG MAG AR15 5.56 BLK ROLLER FOLLOWER 40RD PROMAG MAG AR15 5.56 BLK ROLLER FOLLOWER 40RD](https://cdn11.bigcommerce.com/s-c6aiidxwtg/images/stencil/300x300/products/33580/41415/BHPMRM40__20789.1738866469.jpg?c=1)
40-round magazine - Fits AR-15� 5.56mm rifles - Over molded stamped steel feed lips and magazine catch - Magazine body constructed of a proprietary DuPont� Zytel� based polymer - Patented anti-tilt Roller follower - Magazine spring formed from heat treated chrome silicon wire - Made in USA