Works on a .300 aac with a 7.5" barrel - KAK Extended 5/8-24 Flash Can

Using this on my .300 AAC with a 7.5 inch barrel that has an A2 birdcage, and if I shoot a single shot without my ears on, my ear blows out and I'm deaf for a few hours. I put this thing on and my first trip to the range, forgot to put my ears on, and after a couple of shots, my ears we're even ringing, let alone deaf. Yeah, this thing does what it says it does. It doesn't reduce decibels, but i forwards all the blast and concussion away from the shooter, and it does it very well. Another thing I noticed, is that it also seems to recoil softer. Its noticeably softer recoil than my 5.56 with a 16" barrel. Now, I cant stand the slots at the forward end of the device. I know its to help tighten the device for tucking under longer rails, but man does it look ugly. As much as I hate it, it doesnt affect the fit or function of the device, so I wont be taking a star for it. But goodness, its ugly.