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. 15 Round Capacity with Left and Right Side Round Count Indicators at 10 and 15. Compatible with Reversible Magazine Release for Left or Right-handed Users. Compatible with GLOCK 19 and 26 and Most Other Pistol Caliber Carbines, Large Platform Pistols, and Pistol Clones that Take GLOCK Magazines. Easy Disassembly and Maintenance with Removable Flared Floor Plate