Newbie here to the world of carbines and have question on mounting the BSA RD30 red dot on 995TS. My question is the mounting brackets that hold the red dot to the rail are marked with 3/8 on one side and 5/8 on the other, what do these measurements pertain to? When I try to assemble it on the rail the only way i can make it work is if i have the 3/8 up on one side and 5/8 up on the other side. It is holding but does not look correct. Hopefully I have posted this in the correct section of the forum. Thank in advance for help with this!