Those are supposed to be Texas rednecks, is that what they said? That's no Texas redneck accent, that's no Texas redneck dialogue. It's like believing Sean Connery is a Russian in The Hunt for Red October...and the costumes are wrong too. Anyone else notice that the white wife-beater and white undershirt are spotless? It's like they're from a laundry detergent commercial.
That's totally faked.
EDIT: Good catch with the Toyota Tundra, 2hondas. Not the right truck for the antagonists of the film. It's not quite as out-of-place as a Ridgeline, but it's close...
EDIT2: SIVIC--If you've got a concealed weapons permit, you certainly can carry a firearm in your car. Otherwise, how would you get around? Even without a concealed weapons permit, I believe it's legal to carry your rifle or shotgun in a visible gunrack in the rear window. This is not legal advice; I don't do criminal law. Just practical knowledge I've picked up.