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. 33 Round Capacity with Left and Right Side Round Count Indicators at 10, 15, 20, 25, and 33. Easy Disassembly and Maintenance with Removable Flared Floor Plate. Compatible with Reversible Magazine Release for Left or Right-handed Users. For GLOCK 9mm Double Stack Pistols and Compatible Pistol Caliber Carbines, Large Platform Pistols, and Pistol Clones