I think it was the Miami Shootout that caused the FBI to change their policy to now carry more sophisticated weapons in the pursuit of bank robbersIIRC, some agents at the Miami shootout had "more sophisticated weapons," but the weapons were stolen from the agent's vehicle while the agents were in a restaurant gang-banging a waitress.
Re the "Miami Shootout": agents also lost eyeglasses and could not see, and another ran away and hid until help arrived, another's pistol slid off the seat and could not be reached when they braked hard behind the robbers.
Keystone Kops, "Famous But Incompetent".