Ok. So I've been on here a while. Read alot a learned alot. So I made the plunge and got a brand new Colt AR. It has the magpul BUS on it and I plan to add a dot but want to get a class under my belt. While shooting I noticed the rail can rotate a little bit. Not alot, but just enough that it moves my group about 6" at 100 yards. Is there any way to tighten the rail? I beleive the rail is made for them by Troy. Is that much rotation acceptable?

