I just had one of my barrel's profiled and threaded (nice job BTW). Now I'm looking at more shop services for my other rifles.
1) I have a Bush M4 upper with a 14.5" plus a permanently installed KKF A3 tac brake. I'd like to replace the Tac Brake with the Phantom FS I have. Barrel is threaded underneath. I understand this is a $64 service?
2) Do I need to remove the barrel from the upper prior to sending it to you?
3) I have a post-ban Bushy SuperLight barrel. I'm thinking about having it threaded. Can you do this so the FS will be removable (i.e. do you add in a shoulder of some kind)?