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 - ADVANCED POLYMER BENEFITS - Extreme Impact Resistance- won't crack or break when dropped - Very resistant to harsh chemicals - Superior heat cold and UV resistance- won't become brittle over time even when exposed to harsh environments or extreme cold - Creep resistant- the feed lips and body won't spread when being stored long term even when fully loaded