A Superior Grip is achieved with the Patented hexagon surface pattern. Anti Tilt Follower was designed to help stop residue particles from entering back into your rifle. High Visibility Orange Follower allows for safer clearing of your rifle's chamber. Tool Free Design, no tools or bullet tips needed to disassemble and clean the inside of your AR-15 magazine. A Heat Treated 17-7 PH Stainless Steel Spring, allows for long term magazine storage while fully loaded. Stainless steel resists corrosion unlike music wire or silicon steel springs. Magazines Reinforced Polymer Construction is lighter than other leading AR-15 magazine. 5.56 x 45 / .223 Remington, 300AAC Blackout Mfg: Hexmag