Does the ARMS 22M68 allow an Aimpoint to co-witness when used on the lower portion of the ARMS 39 gooseneck? I know they will attach to each other but I don't know if they line up.
Yes it will, I use that combo on my Bushy M4 A2.
If you have any questions about it call ARMS, that is what I did before I bought. But I'm sure you will get good info here too.