Magpul PMAG 21 GL9 Glock 9mm Luger Handgun Magazine - 21 Rounds - The PMAG 21 GL9 is a 21-round Glock 9mm Luger handgun magazine featuring Magpul's proprietary all-polymer construction for flawless reliability and durability over thousands of rounds. Meeting the overall length requirements for a 140mm competition magazine, the PMAG 21 GL9 offers additional capacity without the need for expensive extensions. It includes 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 21 GL9 is compatible with all full-size, compact, and sub-compact double-stack Glock 9mm variants, with some protrusion below the grip. Magazine Drops Free Loaded Or Unloaded Made In The USA