I was watching the video on Youtube about the Masada\ACR. I know the ACR Is more advanced, but I figured people would better know what I was talkng about if i mentioned Masada as well. Anyway on the gastube the spokesperson was talking about haveing a 4 selection gas adjustment. From more gas to no gas. Why would this feature be useful? No gas would mean no cycle right? Or am I wrong? And to much gas would be a problem I would think too? Is this for elevation changes or what? I know having an adjustment on everything is great, but I would think this is one area you might not want to mess with. Thank you everyone on here. You all are awesome. I love to meet new people at the range everyweek.