The Yankee Hill Machine Phantom QD Muzzle Brake is for users who desire a muzzle brake instead of a flash hider. YHM now offers this Q.D. Mount muzzle brake for their Light Tactical .30 Cal. Sound Suppression Systems. Sound suppressors naturally work as a muzzle brake, this Q.D. mount will decrease recoil of your host firearm even more. The Redesign of the YHM-5M2-QD has a smooth sleek look which eases cleaning, and because of popularity Yankee Hill decided to apply this to their .30 Cal. Muzzle Brakes. The redesign also features an improved mounting service which makes attachment quicker, and easier.This muzzle brake WILL NOT accommodate the 5.56 Phantom, Phantom 5.56 M2, Turbo, Turbo T2, or Turbo K Sound Suppressors.