On Sunday, the guy I bought my AR from and another dealer put together a suppressor shoot where they demoed a bunch of different suppressors for pistols and rifles and then we got to shoot them.
I shot one video. I'm shooting an M4 style automatic. rifle.
I also shot a belt-fed AR style automatic rifle as well. Pretty sweet. There was only one casualty. A suppressor mounted on an AR wasn't seated properly and a bullet went through it at an angle. It was my dealer's son who was shooting it at the time. If you look at the full-size image, you can see it's setting at an angle.