The PMM Sight Tracker is neither a muzzle brake nor a muzzle rise compensator as it has no ports to redirect the gases exiting the muzzle. What it is designed for is to provide an extended sight radius because the front sight can be mounted on the very front edge of the Sight Tracker. It’s kind of an alternative way of having a long slide pistol. So Sight Tracker is technically a muzzle device as it’s mounted to the barrel but it works as a slide/sight radius extension.