Since living in my pickup truck now fulltime I've settled on 2 'truck guns'. Neither is a handgun as I simply don't care to be bothered with the myriad number of handgun laws of each state and even within states depending on jurisdictions and often never even knowing what jurisdiction I might be located at.
I have in fact owned a .357 magnum for over 45 years, reloaded for it, etc. Its a great gun and was given to me as a gift and were it not for the massive and confusing hand gun laws at federal & varying state & local jurisdictions, I probably would have it with me. BUT, as written it was a gift and its monetary value alone today, new, well I can't believe what they sell for AND since its far more likely that it would be stolen from my vehicle, rv, etc rather than need it for self defense. I choose not to have it with me.
Rather I have determined my criteria for a "vehicle utility firearm" or when I was growing up - we called it a "truck gun"........
The truck gun has to be rugged, simple, small, easily maneuvered, of common cartridge and above all else CHEAP! A gun you don't have a lot of money into, good tho not great for any firearm need; something you have no emotional attachment with because its going to get beat up, thrown around, bounced around and you might lose it or have it confiscated, even if you've done nothing wrong.
My favorite 2?
1: An old .410 Western Field 3 shot bolt action shotgun. I paid 10$ for this gun almost 40 years ago from a guy getting divorced needed $$. I've cut the barrel on it to 18.5" with a pipe cutter. "Reamed' the end of it with a 3/8" drill. filed the end smooth and then "reamed" again with a 7/16" bit and chamfered with 1/2 " drill bit. Used a large chain saw file to dress up the interior barrel end and then checked all with a set of interior calipers at barrel diameter of .409 to .412 - PERFECT! I cut the stock a lil bit too and sanded round & smooth; can still shoulder mount - overall length? 34.5"
I use federal slugs in this peashooter as strictly a self defense tool. It is light, easily maneuverable, can easily point & shoot with one hand;; the lil 110 grain lead slugs at 7 yards (typical self defense range) have kinetic energy exceeding .357 mag & approaching 41 Magnum ballistics. The soft lead alloy expands RAPIDLY with capability of massive internal wound channel with no concerns for over penetration........ its legal pretty much everywhere with no special needed permits and it was CHEAP!
Gun #2: A Chinese SKS Paratrooper model chambered for typical AK 7.39 mm round. Fixed 10 round mag completely in its original state frum when I purchased it 30 years ago for 85$ - so yeah tiz all Cali legal when I go there and hang in the desert, etc. This is a great all around utility gun - good at everything, great at nothing, and again CHEAP (tho I see now todays market has these lil Chinese guns going for a lot more than I ever would have imagined.)
My 2 "truck utility guns"..............INTjohn