It was how guns worked for hundreds of years. Uncovering arms before that would have been something sharp or pointy.
Don't see to may people with poleaxes these days
Fixed that for you...
““The problem, often not discovered until late in life, is that when you look for things in life like love, meaning, motivation, it implies they are sitting behind a tree or under a rock. The most successful people in life recognize, that in life they create their own love, they manufacture their own meaning, they generate their own motivation. ”—Neil deGrasse Tyson