To ensure proper installation use all the hardware provided with the muzzle brake: Muzzle brake Crush washer Gas port adjustment screws x 5 Thread locker Installation steps: 1.Install muzzle brake onto prospective barrel with provided crush washer without the gas port adjustment screws. 2.Test fire approximately 10 rounds to establish a muzzle rise / recoil control 3.Fully seat screws as needed until desired reduction of muzzle rise / recoil results are achieved. 4.Record the number of screws used and its prospective location and remove the set screws for cleaning. 5.Proceed to clean the threaded ports and screws removing all carbon/lead build up. Make sure your solvent does not leave behind any residue/dry film prior to using a thread locker. 6.After cleaning apply a small drop of the provided thread locker onto the screws and reinstall as previously recorded during the initial test firing phase. 7.Allow a minimum of 24 hours of curing time before firing the weapon to ensure proper adhesion bonding. 8.Once the screws are set we do not recommend further adjustments as it will destroy the bonded seal and you will need to restart the installation phase again.