I would suggest putting the front sight post at the lowest possible location, zeroing the rear sight by moving it up, and then measuring how thick the spacer needs to be.
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Ive got tons of tools. This aint my first rodeo, well sort of, first with a rear carry handle sight.
Lots of good info here. Im not going to be able to report back anything much for probably 2 weeks, but I will for sure be back to report in on where I am at and what I figured out.
I can shoot 50, 100, 200 on paper. I will shoot it at 50 and 100. I could shoot it at 200, but im afraid my eye sight and iron sights wont produce much thats usable at 200. I mean, I am sure I could hit the target, but consistent grouping, not so sure.