I asked him if he was the bass player in Anthrax at one time. Took a hard look at the suppressors he and his spotter were testing. Very nicely machined, good accuracy, very solid design (genius really), very nice tone, like the sound of an eggplant being dropped on concrete from 6 feet up. NO BLOW BACK detected. I am battling an eye infection from the poison gas being blown in my damn eyes every time I shoot. Gets to be nasty business if you shoot 500 rounds plus a week suppressed. Looking forward to having one of these cans dangling on the end of my AIAW .300 win mag.