Although I don't currently keep a rifle in my car, if I was going to, I would probably throw my Mosin Nagant M44 loaded with 5 rounds of 203 gr SPs and a few stripper clips loaded, simply because I am familiar with it, I trust it, never misfired on me, durable, and can take anything in North America. Anyway I like the way it feels and handles, thats just me. If I had an M1 Carbine I wouldn't mind one either, I like how they shoot. Of what I own though, my second choice has to be my WASR-10. But I am a softy for Bolt Actions. Oh and ofcourse that folding bayonet, well better to have it if I need it...