HammerHead Muzzle Breaks serve two purposes. First they enhance the look of your barrel or marker and second they are reversed ported to reduce air turbulence at the end of a barrel. As a ball leaves the barrel, turbulence occurs in front of the ball. To reduce that air turbulence, the reverse porting disperses this air pressure to help improve ball flight. There are a variety of muzzle breaks styles available including M16, Battle Stikxx and Bang Stikxx designs.