We travel a lot in our RV and always have something along for defense. Usually a 9mm pistol of some variety. Saw a nice little Mossberg pistol-grip 20ga 14" bbl AOW the other day and I thought it would make an excellent addition to the RV. After checking the federal regs, I don't see any problem crossing state lines with it. But, what about state regs? Do I even dare take this thing to California for our winter vacation?