Fits the .45 GlockA(R) 21, 30, 41 Available in 9, 13, 18, or 30-Round capacities Due to the wide variety of extensions for GlockA(R), the ETS mag base is designed to be compatible with GlockA(R) extensions Easy disassembly with our specially designed base plate Ergonomically designed floor plate makes it easy to grab from mag pouches 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 Translu Mfg: Elite Tactical Systems Group