The Alexander Arms Millennium Compensator uses a series of four compound angled slots on each side of the unit to redirect gas in a backward and upward direction. The combined effect of recoil reduction and muzzle jump reduction works very well on the .50 Beowulf and allows for rapid follow up shots. Back blast is noticeable from this unit. One feature that sets the Millennium Compensator apart from the other .50 Beowulf muzzle brakes is that it produces not only a braking effect, but also a distinct downward force to counteract the muzzle flip of the weapon. Please note Alexander Arms tells us these brakes are only for use with 49/64"-20 threads of their specification. FeaturesFour Compound Angled SlotsRedirection of Gas in a Backward/Upward DirectionReduced Muzzle JumpCounteracts muzzle flip with distinct downward force