You will need a barrel vise block or rubber vise bumpers, the correct wrench and some carb cleaner(or any other non lubricating cleaner). remove current muzzle device and clean the threads on barrel and in the new brake with carb cleaner then let dry. Once dry, hand thread on the brake until all the way on and see where it lines up in reference to the chart in the instructions. From this you should be able to get the shims that will get you close. Select the shims that will align the brake hand tight so that you need about 22 degrees more rotation to hit dead center. Remove, put included rock set on the threads then tighten until centered.
I've seen zero change in poa/poi out to 600 yards. Recoil is better in that it's straight back, no rise.