In this video we have a Bartlein 30 cal barrel that is threaded 5/8 x 24. We have the barrel shoulder squared up. We have a Thunder Beast Arms Corp 30BA brake installed with a 30BA suppressor installed. I placed a .0001" indicator in the muzzle end of the suppressor to measure the runout once the suppressor is attached to the brake which is shouldered up against our barrel threads. We came up with a muzzle runout of .0045" which is very good considering we are stacking a suppressor on a brake which is threaded on a barrel.
