Caliber: 9mm - Capacity: 10rd - Works with ETSCAM-RIFLE speed loader - Extremely reliable feeding - Even with hollow points - Far lighter than steel magazines - Fits standard MP5 mag pouches and couplers - 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