So I would like to quickly move my ATN night vision scope between rifles and I'm looking at QD rings. I like the idea of the one piece set up but most are quite heavy, 7 - 9 ozs and most that I come across are made for AR powder burners. They all claim sub MOA return to zero. The 2 piece set-ups are clean and lighter, but I'm concerned about the return to zero and if they are equivalent to the one piece set-ups in that regard. Thoughts, or even suggestions for a quality one piece that is not overbuilt for a centerfire? Kevin