I swapped a bunch of the weapon files around (renamed the pistol's folder as AR and vice versa and such), and none of it had any effect on gameplay. Except, when I went to weapons and storage my computer like froze for a good 10 seconds b4 it loaded, and I bought a couple weapons and everything worked fine, but it was super laggy. The I started a match, and took freakin forever to load (way longer than it usually does for me), and once I got in the pistols and AR's behaved as they should.
I found this very interesting, I'm guessing the weapons are serverside or something? IDK what happened. Maybe it saw that my files were screwed up and automatically retrieved the correct files?