Alright,, the parts are for adapters for barrels to to accept a can. The problem is that the barrell is threaded for 5/8x32 to accept a brake and the cans are threaded 5/8x24. So one end of the adapter needs to be threaded to go over 5/8x32 then have a small spot which would accept a wrench and the other end would needed to be threaded 5/8x24 to insert into the can. The part shouldnt be more then 2 inches long i would imagine and then for the center bore, it needs to be bored probably around .400-.450 so that the round can freely pass through the adapter as it travels to the can. The reason for no tooling marks inside the bore is that it would affect the airflow as the round passes through and if it changes the path, there is a risk that the round could strike a baffle as it travels through the can. If I do this, I would also have an another adapter made which has the 5/8x24 on the can end and 1/2x28 on the other so that it would thread over an different barrel. Ideally, I would like an 11-15 degree bore crown on the can side of the adapter To be honest, I still havent decided if Im going to do it but I wanted to see what something like this would take to make to see if its worth the cost. Like I said, I have people that can do it but if someone with experience is local. I would love to be able to watch the process if I decide to do it. Its about a year away but I need to know all associated costs up front before making my decision