The UTG GL933 Magazine is designed for Glock 9mm Double Stack Pistols and Compatible Pistol Caliber Carbines and Large Platform Pistols. Durable and Impact Resistant Glass Fiber Reinforced Matte Black Polymer Construction. Anti-tilt High Visibility Blue Follower and High Longevity Stainless Steel Spring for Reliable Feeding. FeaturesLeft and Right Side Capacity IndicatorLeft and Right Side Magazine Catch Cutouts Compatible with Reversible Magazine ReleaseRemovable Flared Floor Plate for Quick Disassembly and Easy Maintenance 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.