I drive an F150 extended cab with the suicide doors. Secured to the back of the passenger seat is an old Triple K saddle scabbard. Yes, a saddle scabbard, just like John Wayne and Clint Eastwood used. I know what you're thinking, too: that's gotta be awkward as hell to get at. It isn't. Just reach your right hand out, grab the rifle by the wrist, and slide it out, then shove it out the window. Simple as that. A 22 of some sort has rode in it every day for the past 3 or 4 years, or a 30-30 during deer season. Sure, my way's unorthodox, but by damn it works, and best of all, didn't cost me a dime!
Mac