This is the ProMag AR-15 .223/5.56 100-round drum magazine.

If you’ve been looking to maximize your AR-15’s capacity, look no further than this high-quality drum magazine from ProMag! 

Constructed from a proprietary DuPont Zytel-based polymer and featuring overmolded steel feed lips, this magazine delivers a superior blend of weight mitigation and durability. Inside, you’ll find a heat-treated chrome silicon wire spring and an injection-molded polymer follower, which ensures all of your rounds stay perfectly aligned and ready to fly down range at a moment’s notice! 

Extend your fun at the range and grab a drum magazine today!