I'm having a bitch of a time.
I have a used Colt lightweight carbine that I bought some 2-piece MI Colt-compatible HG for.
I've put on Bushy, Colt and RRA HG on this rifle before, easily.
Your 2-piece are resisting my efforts to get them installed. I tried for a half hour yesterday and almost pulled out the dremel...
What am I missing, which should be put on first, upper or lower?