This is a STI slide that camera with the fine straight cocking serrations on the rear. I wanted something with more bite so I milled out every other one and cut the ones in the front. Then machined the bomar dovetail and the front dovetail for the sights. Sent it out to have it hard chromed and here is the finished part ready for the sights. Will post finished firearm when I get a couple of parts that need hot glueing done before I can finish