I don’t see how it’s anti-gun. It shows Ralph’s protecting his family against Black Bart. What a great endorsement for having guns to protect your family.
It’s not about that either. It’s about the catchphrases moms uttered in the 50s. “You’ll shoot your eye out” was just one of them along with “eat all the food on your plate, there are starving children in Africa.” It’s a joke!