Well about a hundred of them I salvaged them from a national guard depot, while also salvaging barbed wire and pointy sticks for my base perimeter defenses. The others I’ve just kind of picked up when I came across them. My trapping is high enough that I can disarm them safely.
I figured I would either build a minefield or disassemble them for gunpowder to make explosives, bullets, etc. I’ve still got shitloads of barbed wire and pointy sticks left too. I salvaged almost a whole side of a nat guard base worth of fencing.
Plus, I kind of hoard everything that might be useful for something one day. Ex: 2524 lbs of ammunition, 2000L clean water, 1200+L gasoline, 950L diesel, inumerable pieces of equipment, etc. This character has survived almost 2 years, so he has had a lot of time to hoard.