Hi,
I've only recently been told about the 30/221 AKA .300 Whisper. I was told about it by the person who built me a nice custom upper for an AR-15. That upper is in .223 Rem and has provision for a suppressor that I already purchased a long time ago for a Colt AR-15.
Now I'm seriously considering the 30/221 as a new AR-15 upper project. Everything about this round screams, "use a suppressor". Anyone in the US who has a suppressor knows what a headache it can be to go through the Form-4 process (mainly getting the CLEO signature. Once that is obtained, the rest is fairly easy except the long wait).
So now I'm researching suppressors that have been used for the whisper. I'm looking for experiences from people who actually own them and how satisfied they are. So far I've got three in consideration:
The AAC Cyclone
The Gemtech HVT (threaded version)
The AWC Thundertrap
The AWC is actually out of my price range at $995 + NFA Tax + PA sales tax.
BTW, what sort of noise levels do you get without a suppressor? I don't want to do yet another form for an SBR, so I will have a 16.5" barrel made in 1:8 twist. With luck, such a "long" barrel won't mess up accuracy.