Barrel Thread size and Pitch for Steyr?

[E_T_G]

Hi, All.
I have searched everywhere and can not find a definitive answer for the muzzle brake threads for a SSG-04 in 300 WM and SSG-08 in 308. I have seen both 5/8x24 and M18x1 and M18x1 LH. If someone knows the real specs I would sure appreciate it. I was looking at suppressors but I really do not want to remove the brakes if it is an odd ball thread like 18x1 LH. The info on Steyr's site says the brakes can take a quick disconnect suppressor but They do not say a brand - probably Steyr propriety. I do not know enough about suppressors to know what would fit them. I have contacted Steyr US but have not heard back.
Thanks,
E_T_G

 

[Laseredge]

I used to have SSG08's, and went through this same thing.
It is M18x1.
I used a Thunder Beast CB brake mounted suppressor, they make a M18x1 brake.

 

[Kamerad]

My SSG 04 had the same, M18x1. ~2013 production. Huxwrx makes a brake in that spec. I think I still have the factory brake in a box somewhere - want it?

 

[E_T_G]

Thank you both!!! I appreciate it more than you know.
E_T_G