Can anyone tell me what height rings to get that will clear a mark4 with 50 mm obj, on a M1A in a sage EBR stock, using an ARMS #18 mount? I acquired a set of night force rings that I believe are low, and I'm about 1/4 in or less to low. The objective hits on the rail. So I need to order another set, and was looking for some advice from someone already using this same set up! Thanks for any help!