Features: Flush fit for Smith & Wesson 9mm M&P Standard 17 round capacity Base plates interchangeable with ETS line of 9mm double stack magazines Easy disassembly with our specially designed base plate Ergonomically designed floor plate makes it easy to grab from mag pouches Lifetime warranty 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 Due to the wide variety of extensions for Glock, our mag base is designed to be compatible with Glock extensions