Screw the compensator about the barrel, ATTENTION tighten the comp, then back again off until finally it is square over the slide profile. To keep situational awareness and secure your ears, Be sure that you’re carrying strong ear security if you’re taking pictures a pistol that has a muzzle unit. https://beretta-m9-muzzle-brake21260.blogthisbiz.com/32694680/getting-my-beretta-m9-muzzle-brake-to-work