Just a quick question about my gas lock and gas port alignment. I removed the gas system from my rifle just to do it. I like to know my firearms inside-out plus I wanted to know how to remove everything for shim installation later on. Before removing it my gas lock did not tighten up at 6 o'clock, more like 7 o'clock, and the ports were not aligned perfectly. It shot just fine though. I reinstalled everything and lined the port in the barrel up directly with the gas port on the cylinder and now my gas lock snugs right up at 6 o'clock. I did not remove my FS so I did not flip the gas lock. I obviously did not tap the gas system as far back on the barrel splines and therefore got a slightly snugger fit with the gas lock. But I judged where to leave the gas cylinder by the port alignment. So my question..is it better to have the gas cylinder tapped as far back as possible and have slightly offset gas port alignment and a loose gas lock or leave it like it is? will the gas system move back while shooting and ruin my threads? I would think that the gas lock and gas plug will hold it where its at. I plan on shimming it soon anyways but I figured this was a valid question regardless...I'd like to know.