The best years of the show were the early ones with the character of Barney Fife, Andy's deputy. It was a running joke that Barney was the one obsessed with pomp and police procedure, and all the weaponry he could find an excuse to wield (generally limited to a revolver and a single bullet carried in his breast pocket). In fact Barney was bereft of talent for police work or any real courage (his single outstanding character virtue being his unshakable loyalty to Andy). A recurrent scene was Barney quaking with fear as he faces some imagined threat while fumbling for the bullet in his breast pocket.
The following bit of by-play is typical:
Unfortunately, for some reason nowadays a lot of people take Barney Fife as a role model. They don't get that he's a joke.