But again, it's a game and that's probably asking too much of Fallout when there are other, more intense survival/post-apocalyptic games out their filling that niche. Production should be limited to places like Diamond City and setting up a weapons production center in one of your settlements should be a BIG deal. Pipe weapons should be even more common than they are early in game and should be way more expensive, as should ammo. I do wish the economics of weapon and ammo production and repair were better taken into account in the game world. But, it's ultimately a game, so I let that slide. That goes for pretty much every pre-war object in the game, frankly. Even weapons that were meticulously maintained over that whole period would not be fit for the heavy wear we see them put through in the game.

Unless they're stored in an air-tight, climate controlled environment, pre-war weapons would have no chance of being functional after 200 years. What does bother me is the number of pre-war weapons and ammo still in existence and in perfect condition. Some mods on my list need this, so I’ve added. I think with the current state of development in the region (and nearby regions), it is not unthinkable that there are guns being made in or near the Commonwealth. They are also fully compatible with all armor and body mods that need Type3 bodies.

Fallout 4 pick up bodies mod