The quality of these brakes is on par with the brakes we carry from our Canadian-made suppliers.
This is the Triple Port design - similar to the classic Miculek-style brake (and very similar to the Colonel Mustard brakes that we have sold for years - but with a better finish).
Some Tikka's use
this thread size - if you have other calibres smaller or the same size
as .308 (like 300 Win Mag) this brake will work for those calibres too.
We recommend a screwdriver with a few wraps of duct tape around the shaft - insert through the 'gills' of the brake and then twist on to crush the washer and keep it all straight and tight. Just ensure that you don't turn too far - if you back off you will need a new crush washer! See pic for correct install orientation.