I just bought an M1A and would like the option of mounting a scope. Because I don't see myself shooting with a scope that much I'm trying to avoid getting a mount that gets pinned to the stripper clip guide mount. Any suggestions on a QD scope mount and do "repeat zero" mounts really repeat zero? I m not looking to shoot silver dollars at 1000yds but would like to be confident taking a 400-500yd shot at a deer.