I'll try to finish what I started. This is the sighting system I set up for my Chapuis. I used the aperture from an XS sight. Drilled and taped a .220-64 thread in the rib. Drilled and taped an 8-32 thread intersecting the .220-64 from the breech face of the barrels. This hole prevents the plunger that releases the bolt lock from being pushed flush into the breech face. Used an 8-32 socket head set screw to lock the aperture. This screw is short enough to sink below the rib face. Screwed an 8-32 nylon rod down tight to the set screw. Cut it flush and slotted it thus, allowing the locking bolt plunger to be pushed flush with the breech face. Filed 2 flats on the aperture thread to lock it. Milled a dovetail in the front sight ramp and installed an XO post front sight.

Dave

I made a wrong turn someplace.

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