esl conversion causing weird gun issues

[choochoo1]

So I'v been converting some of the stand alone gun mods into ESL files for obvious reasons, But iv noticed that when I do this sometimes the guns "break", literally, in third person and in the world their fine, but in first person theyre just exploded parts. it only seems to effect some weapons and only weapons. Armors, settlement objects, all fine. I was wondering if anyone knew what caused this and if there's a way to fix it.