designed for 8.5in 9/16 brass, uses 2 4-40x 3/8in screws from a caliburn to attach the barrel and slide. Cut the stock slide/barrel spring down so its just loose (almost no preload) and sand your brass as needed. Step files are included feel free to design your own muzzles to attach.
I recommend printing both with 2 walls and 15%infill to save weight, If your slicer allows it increase the walls around the spring hook to at least 4. The Replacement Barrel does not need supports, the Square Suppressor does, make sure all support material is removed before assembly there should not be any gaps between the 2 parts.