The Pig/Sound Blaster directs the sound and blast to the front of your weapon while firing. We are all painfully aware of the uncomfortable concussion of a good muzzle brake. Our product threads to the muzzle brake with the proper adapter. We have these in anodized aluminum to the outer dimensions of the C tube and in Titanium to match the outer diameter of the D tube. I personally use the titanium for the cool factor, but both work equally well. >>>Click here to join and ask questions on the SD Tactical Arms Forum!SD Tactical Arms strongly recommends following all rules set forth by the NFA.