ProMag AR-15® 5.56mm Roller Follower (40) Rd - Steel Lined Black Polymer
- 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