No problem. I believe it is a Roughtech model. Those are threaded 5/8x24. The one I was looking at was machined so well that it just looked like a brake on the end of the barrel. Here is the link to nathaniels rifle. I'd ask him to verify:

Tikka 6.5 PRC for sale in classifieds

Originally Posted by raybass
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style.
Originally Posted by Pharmseller
You want to see an animal drop right now? Shoot him in the ear hole.

BSA MAGA