I have one that I got for a VERY short SBR. It's not going to be hearing safe. I have other .30 suppressors, too. Were I to do it over, I'd get the Energetic Armament Vox in the S or K. The S is about the size of a .223 suppressor, but surprisingly quiet. I haven't heard their K model, but if the S performs so well being so much smaller, their K probably works well, too.