SNorth said:
After the apocalypse we will fight with sticks and stones should be the reality.
Well, I doubt that it would go
that far. Not to flaunt it, but there's quite a number of guns in America, even in gun-fearing California. We can't assume that a nuclear blast would disintegrate most firearms while leaving human survivors. In fact, as an inanimate object, you'd figure a gun would last since it won't have to deal with those trivialities such as nuclear fallout, starvation, etc.
But moving back on topic. In reality, the so called old-school weapons would number more than your fully-automatic submachine gun. The popularity of some weapons just dies hard. WW2 sounds oldschool to some people but we can go even further than that. Even cowboy era guns and calibers are still used today, whether its in the ridiculous sport of cowboy action shooting or in modern day hunting. The practical and ideal hunting cartridge, .30-30 Winchester, was a "cowboy caliber" and the practical and ideal rifle it was used with was the lever-action (yes, cowboy) Winchester Model 94. Revolvers will die hard due to their simplicity and thus functionability regardless of how much you disregard it. The Colt M1911 of WW1 has a stupendously large civilian market (whether the brands be Kimber, Springfield, or even Norinco) and there's a push to reinstating in the military the mean .45 ACP-shooting pistol in favor of the 9mm Beretta.
Without disgressing too further, I'm just trying to clearify the concept of what people deem "realistic". You'd need a Class III weapons license and more money to get your dirty mits on a fully-automatic weapon. Compare that to the functionality, affordability, and ease to obtain a semi-auto or "oldschool" bolt gun.
Of course, we're talking about Fallout which must be allowed its own literary license.