The Magpul PMAG 17 GL19 Handgun Magazine is a 17-round GLOCK 9mm handgun magazine featuring proprietary all-polymer construction for flawless reliability and durability over thousands of rounds. The GLOCK magazines come with many of our other platform PMAG features, including a high visibility controlled-tilt follower, a stainless steel spring, a floorplate that's easily removable for cleaning, a paint pen dot matrix for magazine marking, ridged floorplate edges for better grip, and capacity indicator windows. The PMAG 17 GL 9 drops free whether it's loaded or unloaded. All with the same boring reliability you expect from an OEM magazine.The PMAG 17 GL9 is compatible with most full-size 9mm GLOCK handguns, as well as compact and sub-compact variants with some protrusion below the grip.