Used In: Predator, Terminator 2: Judgement Day. How Noticeable? They're both Arnie films, made around the same era and, oh yes, IT'S A HUMONGOUS MACHINE GUN. Difficult not to notice, even if you wouldn't guess that it's the exact same prop. Arnie probably just had it lying around in his shed at home and decided to bring it in to work for a laugh both times.