This is the ProMag 2011 9mm 50-round drum magazine. 

Maximize your 2011 capacity with this high-quality drum magazine from ProMag!

The magazine’s body is constructed from a proprietary DuPont Zytel-based polymer, paired with a steel magazine tower, to provide superior durability without excessively weighing you down. 

Internally, you’ll find a heat-treated steel spring and an injection-molded polymer follower that work together to provide flawless feeding. Best of all, these drum mags are made right here in the United States! Whether you’re heading to the range or protecting your home, these drum mags will have your back!

Don’t hesitate to grab one today – you can thank us later!