Hypocrisy? YES! Anyone who makes their money and fame off guns in movies, then use that notoriety and $$$ to speak out anti-2A is a hypocrite in my book.
Stallone wouldn't be in a position to make his anti-gun statements to the masses if it weren't for movies like Rambo & such. Well, he could make the statements, but nobody would know who he was or care what he said.
If Stallone is has such strong anti-2A sentiments, he should start making movies that don't involve guns. Where he's sensitive, romantic, and maybe sings. Oh wait, he did that already with Dolly Parton in "Rhinestone". And we know how great THAT movie was.