these are seperate baffels from the hex can in the null zip. you can stack them in a slicer or cad software as u like and print..Only for 22lr. theres 2 diferent thread addapters (1-2x28) and (7-15x24). could also just print and wrap with fiber glass or somthing.just make sure its all straight. like using a rod keeping them straight.added therads