This is the Shield Arms 9mm 22-round magazine for Glock 17 pistols.

Maximize your Glock 17’s capacity without sacrificing reliability with this 22-round magazine from Shield Arms!

With an OEM 17-round Glock magazine as the base, Shield Arms pre-installs one of its +5 magazine extensions to deliver the ultimate magazine. That means you still get the rear-facing witness holes, anti-tilt polymer follower, and steel-lined polymer body. 

Best of all, Shield Arms backs each magazine with a lifetime warranty and its infamous Spring for Life guarantee! 

Grab a few of these 22-round Shield Arms magazines while you still can!  

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.