NYLON AR15 Mag Features: State-of-the-art long fiber polymer provides unmatched toughness and durability Improved feed lip geometry allows better compatibility with more receivers Over insertion tab is larger to increase mag retention Standard 30-round capacity Compatible with .300 Blackout No tilt follower with reliable bolt open on last round Fast and easy disassembly for maintenance without tools via our specially designed floor plate Ergonomically designed floorplate makes it easy to grab from mag pouches Magazine grip ribs gives you superior control Lifetime Warranty