The last time I went deer hunting, my friend had a vertical rack mounted between the front seat of his old Toyota 4x4 pickup truck. It held two rifles side by side, resting vertically on their recoil pads, and held in place with velcro straps.
"Give me Liberty, or I'll get up and get it myself." — Me
"A liberal is someone who doesn’t care what you do as long as it’s mandatory." — Anon