The only real part missing is the pivot bolt. You use the regular stock srews for the base, and most people change apertures. The standard TC aperture is a small target one. And on the TC sight the original pivot bolt did not have detents like a regualr vernier does. You have to tighten up the bolt(it has a large head). You can buy an original aperture for $12.

I was sure someone would figure out a way to make a small bolt fit, and buy a sight for 1/2 its value. Tom.