>Many states do not allow private ownership of Class 3 weapons. Even in those that do, some jurisdictions will not sign off on a class 3 permit, and they don't have to if they don't want to, and there is no recourse.<
I may be wrong, but I think that depends on jurisdiction. It's my understanding that the CLEO can't just decide "no... you can't have it": they are supposed to have a legitimate reason, such as "it's illegal in this city/county"...
Here in WI, we have a preemption law (meaning no municipality or county can have a law more restrictive than the state's). There's no state-level law against NFA. SO... seems to me that, if my CLEO doesn't want to sign off on a Form 4, I COULD take him to court to force the issue. Haven't checked that with an attorney yet, and I'd imagine the cost would be SERIOUSLY prohibitive...