As I read the statutes you cannot just ride around with a non-NFA firearm - ironically because of the gap in the laws that enable non-NFA firearms to exist in the legal sense.
2C:39-5.b. Handguns. (1) Any person who knowingly has in his possession any handgun, including any antique handgun, without first having obtained a permit to carry the same as provided in N.J.S.2C:58-4, is guilty of a crime of the second degree...
2C:39-5.c. Rifles and shotguns. (1) Any person who knowingly has in his possession any rifle or shotgun without having first obtained a firearms purchaser identification card in accordance with the provisions of N.J.S.2C:58-3, is guilty of a crime of the third degree.
As an non-NFA is neither a handgun nor a rifle the above does not apply. Therefore, you're now stuck with
2C:39-5.d. Other weapons. Any person who knowingly has in his possession any other weapon under circumstances not manifestly appropriate for such lawful uses as it may have is guilty of a crime of the fourth degree.
Sadly NJ does not recognize self defense as a lawful use so I think you're SOL with a non-NFA firearm. Even with an FPIC, you can't be in possession outside the exemptions for to/from the range, FFL, home, etc.
PS. IANAL and did not sleep in a Holiday Inn Express last night.
I sent mine in a couple years back due to all the falsing from collision sensors on current vehicles. It quieted it down significantly.
Apparently with JVB1(android), you can get control over everything and it can overlay right onto waze. That's frickin awesome!
It will even turn on/off bands based on the state you're in.
Like you, I see no cop running anything but constant on KA in NJ except once I got a laser alert on the turnpike and it was real as I could see the guy with the gun.
It arrives Monday, so I'll get back to this thread once I have some more information.