The two murderers/bank robbers were Platt and Matix.
Michael Platt had a mini-14.
Russel Matix had a pump 12 gauge shotgun.
Platt grew up in Yuma, Arizona. I never met him, but I met his brother. I lived next to him for over a year. He told some interesting stories.
Thanks, I could not remember what the other one was carrying but thought they both had long guns which was a big advantage.