Greetings, I fabricate my spider front sights.
Materials: Sterling Silver, .032" sheet and 1/8" Square Stock.
Draw and Cut Symmetrical Spider Legs. Looks kind of like an X, with a thicker area in the center, in the size you might like 1/2" or 5/8" square sheet.
In the very center drill a hole. With a (square) needle file make the hole square. Chamfer the bottom of the hole, that will be on the bottom.
Hole equal or less than 1/16" FRONT POST: From 1/8th" Square Stock----Leave it as long as you can us like for holding as you want or need for holding in a vice later, say 1 inch. Next-- File a square shaft the size as the square hole in your spider leg base. Place the Front Post Shaft in your Vice. Place the Spider leg Base over the little square shaft, Chamfer Up. Peen over the shaft into the Chamfered area LIKE A RIVET. Then put a touch of solder on it for good measure. After your base is on and you have extra square front sight material in the vice. File the spider legs into symmetry. Now that the legs are symmetrical you need to shape them to the shape of the barrel. WHEN you do this you will find that the legs are no longer 90 degrees to the top of the spider legs. They roll as you bend them over the barrel. With a half round needle file refile the edges so they will be 90 degrees to the top edge. Once you have refiled the base you are ready to inlay. NOTE: You still haven't done any shaping to the front sight post. Later on it can be shaped to a Round Bead, Oval, or whatever. Also when you are sighting in the gun if the sight is off center there's enough silver to file one side or the other to correct. Inlet the sight into the barrel the same way other metal to metal inlay is done. Hank