Crow#21957
50 Cal.
I won't bore everyone with anymore peeps after this one. The arpeture is a lyman. Log cabin has them. The tap and drill bit you would need is 12x40 tap and 13/64 drill bit. You have to run the tap in and out 3 to 4 times to clean the threads and hole. It's obvious the shape. Takes about 2 hrs with hacksaw ,beltsander bench type,and files snd sandpaper. I cut about a 3/8 or so wafer off a 1 in. Square steel bar and go from there.oh yeah I'm thinking shims shaped sane as base to adjust height and belt sander on bottom of sight to lower won't be seen. One coat of perma blue.This is my favorite peep.Tang bolt goes through base and down through stock and into trigger bar.