I love this MK 18! This pistol ate all the ammo I threw at it! First morning I put about 1000 rounds thru it without one hiccup. Never stopped to oil it the whole time. It’s shoots super flat and ejects perfectly with the 5.56 and 223 I ran thru it. It’s light and and the fit is perfect! Ryan really put the effort into making sure everything was the best on this weapon and it shows! Might have to get a 300 Blackout next!