For those people using XLR stocks and ATACR scopes what size, and type of rings did you use. I am running a stiller tac 300 and the stiller 20 moa rail and i just ordered the chassis I got a great deal on the ATACR and rings the A210 from night force they are 1.125" high and wondering if those will work or should I change them to the A214 which are 1.375" extra high thank you for your time.