It is WAY too loud, IMO. If you ever plan on shooting without hearing protection (self defense, hunting, etc..), forget about it. I shot w/o protection once, I kept waiting for the blood to start coming out of my ears. The other 3 idiots around me felt the same way.
A comp really isn't needed anyway, the muzzle hardly moves on my plain end upper when shooting. If your just wnating the "look", I'd go with one of Kurt's Kustom Firearms Fake Flash Supressors. I hear they don't make any more noise.