5.56mm / 300BLK All the features of our coupled AR15 mag, just with a Tritium follower that glows without an external light source. MAG FEATURES Standard 30-round capacity No tilt follower with reliable bolt open on last round Clip on dust cover to keep dirt and debris out during storage 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 Translucent body-allowing you to see your ammo count and type Creep resistant-the feed lips and body won't spread when being stored long term even when fully loaded