Elite Tactical Systems Group Magazine, 9MM, 19 Rounds, For Glock 43X, Carbon Smoke SMK-GLK-43X-19 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.