Do you shoot your can wet or dry? Wait, don’t answer that. This is a family gun blog. Do you know what a Nielsen device is? Or why your gun may need one. Or more important, why you don’t want to use one on your rifle? Neither did we. But reader fireman1291 sure does and shares those tidbits and more in his Silencers 101 vid. He seems to have more money invested in NFA items than most people put into their cars. Not that there’s anything wrong with that. Focus is a bit of an issue, but if you can get past that, there’s some good info here. Enjoy.