(It seems to be one of the few that work decently, so I'm afraid of removing the ARs)
Don't be afraid to remove the AR's. I too was afraid of modding it too at first, but it's worth it. I do have one important thing to tell you: Only take out the prongs and the spring in the barrel! If you've read any of my forums I had some trouble in the past with the AR removal. I had modded two maverick barrels before, but I had taken too much out in one of them(and then it broke). So don't worry, but be careful!