Here's mine. A stubby little .303 Brit.
Also to consider if it's a hot summer day might the ammo be over pressured?
Ohhh... THAT is sweet. If you could only find a "B" marked (bantam) buttstock, you'd have a really compact weapon, although I'm not sure if bantams were ever made for the No. 4s. (I'm a diehard fan of Lee-Enfields.)
Duster, thats a cool little .303!
Although this is a rifle thread, you did say "long gun," and my choice is any reliable make of a pump 12 ga.
I can't ever see any situation where I would need to have the long range capability of a rife; If the range was that far, I can see that I would have a much better chance of getting the hell away from the scene instead of engaging in some long distance shootout.
Apparently Silverbullet has given substantial thought to the issue at hand. A shot gun has its' place and up close it is formidable, unfortunately it is only formidable up close and not all targets are/will be up close. I have always advocated a rifle over a shot gun for precisely that reason. I can hit targets up close with a rifle, as a result I will take a rifle over a shotgun in time of need.
My suggestion was more based on versatility, and although a shotgun is one of the most versatile firearms out there, my concern would be capacity, and stowaway in a vehicle without taking up much space.
A shot gun has its' place and up close it is formidable, unfortunately it is only formidable up close and not all targets are/will be up close.
I travel 75 miles a day just for work, and I am 40 minutes from home.
How would a shotgun take up any more space than a rifle?
And...what kind of "shootout" do you envision where you would actually need a rifle? As I said, if the 'target" is far away at rifle range, I'm getting the hell out of there before I get involved in a gunfight.
gyvel, I hope the best for you, please consider that some may not allow you the luxury to get the hell out of there. As our society continues to deteriorate the chance of being forced to defend yourself/others or be killed/injured is increasing.