I'm doing testing between my recently received suppressors. I've got an OSS and a saker. Both are 7.62's on rock river ehide's. I will be shooting them side by side comparing with a decibel meter. Please note I'm not a real technical guy so my meter my only be an IPad app. Also see if there is any noticeable accuracy differences. I haven't had much time to do much yet. The only nociable difference so far is the back pressure from the OSS doesn't make my un fired bullets in my clip near as black as I'm shooting and the OSS is abit longer overall but doesn't extend the length of your gun as much because it slides over the barrel a substantial amout. I think it only lengthens it by about 4". All I can say so far is I really like them both. I've been using the OSS more because the saker is on my Sons gun.