Magpul GL9 21 Round 9mm Magazine fits Glock Pistols
All Polymer Construction. 21 Round Glock 9mm Handgun Magazine. The PMAG 21 GL9 is a 21-round Glock 9mm handgun magazine featuring a new proprietary all-polymer construction for flawless reliability and durability over thousands of rounds. Meets the overall length requirements for a 140MM competition