If you are interested, I have a RRA A2 upper with a Colt "Blue Label" barrel in the 1/9" twist with a RRA b/bc/ch that has only 50 rounds through the barrel and only 10 on the gas tube, etc. The barrel is the HBAR configuration. I have pictures available if you would like.
I am not really interested in the scope that you have.
Please let me know.