The tide of the Norco shootout turned in favor of the police when one of the assistance response deputies brought out what might have been a personally owned AR-15.
IIRC he killed one of the robbers outright and made the others displace from the ambush that they set up. Apparently these guys not only wanted some money, they wanted to kill some police officers.
"The infamous FBI shootout in Miami woke the LE community up to more modern equipment that gave officers more immediate firepower."
Three of the agents in the Miami shootout were armed with 9mm Smith & Wesson semi-autos.
It was the failure of the Winchester 115-gr. Silvertip bullet to reach Platt's heart that resulted in the modern era of bullet and ammunition design.
This months' American Rifleman has an interesting article by Bill Vanderpool, who is former chief of FBI's ballistics dept. It is, unfortunately, a rather short article, and doesn't go into much detail, but he talks about the aftermath of Miami and the effect it had on ammunition design and testing.
Agent Mirelles ended the shootout with a Smith & Wesson Model 19 revolver loaded with 158-gr. LSWCHP .38 +Ps, which were standard issue to agents at that time.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.