I’m going to be sending out my PO-7 soon to have my slide milled & refinished for a Holosun 508T with BUIS. The rear sight will be milled behind the optic. I would like a lower 1/3 cowitness if possible so as to keep the sight picture uncluttered. My questions are
1) Does anyone know who does 1/3 cowitness? (Primary Machine, CGW, CZC, others?)
2) How close to the original black nitride finish is the black nitride refinishing?
3) Most companies like Primary Machine seem to mill for your specific optic. If some day I had to replace the optic, would another 508, RMR, SRO fit into the slot milled for the original optic?
Thanks in advance if anyone can answer.