In this video we have a Bartlein 30 cal barrel that we just threaded 5/8 x 24 and squared the shoulder. Next we installed an out of the box TBAC 30BA muzzle device and tightened it up with a wrench. Next we installed a TBAC 30BA suppressor on the brake and tightened it up hand time. We placed a .0001" indicator on the exit hole of the muzzle and measured .0045" muzzle run out. In my opinion this is great considering its stacking a suppressor on top of a brake on top of a barrel thread.
Mark
Thunder Beast Arms Corp. 30BA concentricity test. - YouTube
Mark
Thunder Beast Arms Corp. 30BA concentricity test. - YouTube