I play at the local range with a few games where reloads are important. For that, the MkIII line if far superior than the MkII line. I'm not a fan of the LCI and I removed the mag disconnect. I will say, when looking down the sights or through a red dot, the LCI is something I don't see. The push button mag release is far and away enough to get me to buy the current versions. I could see if speedy reloads weren't that important where the Mk II would be a better choice.