Brock I have a question for you. Any idea what the threads are? Trying to decide if I can mate my TI Suppressor on a tikka ultralight. I've been told I really need 9/16 threads to make it work.
The threads on your barrel will be whatever your gunsmith cuts into it. Just take your suppressor and your rifle to your gunsmith and he can cut the barrel threads to match. The outside diameter of your barrel will be the limiting factor.
For a Tikka ultralight, you should be able to use 1/2" or 9/16" threads. Anything bigger (i.e. 5/8" or more) doesn't leave enough "shoulder" on the barrel for the suppressor to butt up to.