ETS mags won’t crack or break, are resistant to heat, cold, UV and harsh chemicals – won’t become brittle over time. ETS 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. 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