This is the CMC Products® 1911 .45 ACP 10 Round Power Mag Plus® Magazine.
The Power Mag Plus magazine delivers the same exceptional quality, reliability, durability, and customer satisfaction as other CMC Power Mag magazines.
What sets it apart is the innovative Power+ follower, which achieves the same functions as the Power Mag follower but better. The follower remains securely within the magazine tube, preventing any contact with the alloy frame material in the event that the slide is released forward with an empty magazine still inserted.
If you own a 1911 pistol with an aluminum alloy receiver, we highly recommend the Power Mag Plus magazine for optimal performance.
