Elite Tactical Systems Group Magazine, 9MM, 30 Rounds, Fits HK MP5, Carbon Smoke SMK-HKMP5-30 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.