Thomas Kitchen
far out that's far more advance then i was thinking Chris.
i was thinking simple kinder like this
if my amazing drawing hasn't cleared that up haha a muzzle break kinder like this with the back threaded and a separate cup or cylinder that screws over it. i can't see how you would machine it in one piece otherwise that would be better. i suggest some grub screws through the thread so it can't unwind otherwise it'll fly backwards towards the shooter if it comes loose.
you could then try it with and without the cup on to