The Sheriff attempting to charge Phelps also acquired a .50 Cal [View All]

[JonLP24]

S.C. Sheriff's Department Armored Vehicle with Belt-Fed Machine Gun

The Richland County (S.C.) Sheriff's Department has acquired an armored personnel carrier complete with a turret-mounted .50-caliber belt-fed machine gun for its Special Response Team.

Sheriff Leon Lott told the Columbia State newspaper that he hoped the vehicle, named "The Peacemaker," would let the bad guys know that his officers are serious.

"We don't look at this as a killing machine," Lott told the paper. "It's going to keep the peace. We hope the fact that we have this is going to save lives. When something like this rolls up, it's time to give up."

The Peacemaker has a top speed of 30 mph.
http://www.policemag.com/News/2008/03/06/S-C-Sheriffs-Department-Armored-Vehicle-with-Belt-Fed-Machine-Gun.aspx

I can't imagine a realistic scenario in which you need a .50 cal in which M-16s can't handle.