I was just about to say to reinstall the mods, then delete any presets with mod items.
This problem is why I add "zzz" to the beginning of any preset I make, so that's all I have to type in to find/delete them. A lesson learned the hard way.
Edit: I have just been made aware that the funny CoD mp5k running animation is vanilla. I'm sorry, I'm an idiot. Lol.
Also, the reason the mod was causing loading issues was having presets of the guns.