Or maybe this beautiful Browning BAR (not the military version, the civilian hunting rifle).
The problem here is not handguns. It's violent people who want to kill cops. This man was determined. I'm much more afraid of a deranged man whose good with a long gun than I am of a deranged man with with high cap handgun. You have to get close with most handguns.
As a cop it was the potential shooter who was 300 yards away that made me worry. I am very proficient with a handgun, but after 15 to 25 yards I'm begging for a long gun.