I agree with the poster defending the MN. It may be low priced, but that doesn't make it low quality. For 69.95 plus shipping, I got a very accurate rifle built like a tank.
It meets the requirements for a truck gun in that:
1 - it was inexpensive, so if it gets stolen...I won't cry too much.
2 - it is not a safe queen beauty so if it gets a few more dings, no big deal.
3 - it fires a very powerful round suitable for more than just self defense
4 - the ammo is cheap (right now)
Drawbacks? Five rounds. Bolt Action. But this is a truck gun. For just in case. If you knew you were about to get into a drug cartel battle, you would bring your ARs, right?
The only REAL drawback I can see:
Length. The MN 91/30 is almost 50 inches long. 48.5" Not very HANDY.
But that can easily be solved by getting a M44.
That said: I have a Ruger Mini-14 for my truck gun. Stainless with a mussette bag of 20 and 30 rounders.