Product Features Fits the 10mm Glock 20, 29, 40 Extended 20-round capacity Due to the wide variety of extensions for Glock, our mag base is designed to be compatible with Glock extensions 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