This is the Smith & Wesson M&P 22X, FPC .22LR 20-round magazine.

The brand new M&P 22X and FPC in .22LR are finally here, with never-before-seen magazines! 

Featuring a durable polymer construction and an anti-tilt polymer follower, S&W delivers superior durability and reliability in one convenient package. You’ll also find a finger recess in the baseplate that allows for quick reloads and extra purchase in the event your mag needs to be pulled out manually. 

On top of it all, the side-facing witness windows provide a constant view of your remaining rounds. With how much you’ll find yourself shooting your new M&P 22X or FPC, you might as well pick up a few more magazines! 

These are sure to sell quickly, so grab some today!