I've always wondered about the possibility of mounting some kind of fastening system to the roof interior of a SUV or van. Lots of rarely used space up there in most cases, it isn't too terribly easy to observe the actual roof inside a vehicle unless that is your intent, and seems like it would be easy enough to cover up as well.
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"If you carry a gun, people will call you paranoid. That's ridiculous. If I have a gun, what in the hell do I have to be paranoid for." - Clint Smith
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