zcrenna,
You don't mention what state you are in, but in many states there is another option.
If you are willing to fill out the paperwork and don't mind a 6 month or so wait, plus a two hundred dollar tax stamp do some research on Silencers/Suppressors.
They reduce noise substantially even with a supersonic round and function as a brake.
http://thunderbeastarms.com/
The main problem is the wait time and the fact that it is hard to own just one
