Tin Man---no problem.
Unless I am mistaken, RA only makes 2 muzzles. Both the closed and open RA muzzles, which are the same ID.
In other words, RA uses the same muzzle ID on the alum and carbon fiber barrel.
If anyone has different information please to let me know. Thanks
LunkerBuster---you can HAVE my alum 120 pipe if you want to wait till Mike gets me a CF barrel