ETS mags won't crack or break, are resistant to heat, cold, UV and harsh chemicals and won't become brittle over time. Their mags come with enhanced features like non-tilt followers, creep-resistant feed lips and clear body allowing you to see count and ammo type, leaving nothing to chance. Standard 9 round capacity Fits the Glock 27 Compatible with Gen 1 through Gen 5 Glocks Compatible with most floor plates that fit Glock magazine Easy disassembly with their specially designed base plate Ergonomically designed floor plate makes it easy to grab from mag pouches