I recently bought two Story Ejector Rod Housings from Midway (I believe it was Midway.) Both were for a studded barrel. The fit on my 4-5/8" is near perfect; on the 7-1/2" a very small gap exists between the cylinder frame and the housing (maybe 1/4 mm.) The convex surface is polished and shiny blue. On the concave surfaces the finish is flat. I find them acceptable.