Just goes to show the Police are arming the officers with weapons and not providing adequate training on what they are issuing and how to use the weapon.
Almost all surplus M16 rifles that have been issued to Police still have 1 in 12 twist barrels and the 62 grain Penetrator rounds are not effective when used in that type of barrel.
50 grain hollowpoints or 55 grain softpoints would be a better choice of ammunition.
If the top cops were thinking rural deputies need weapons with penetration capabilities they should have issued something besides the M16 platform.
A rifled 12 guage or 20 guage shotgun using alloy hardened Brenneke or BRI slugs would be better for this purpose at ranges to 125 meters and I am not aware of cop shops who advocate getting their officers into gunfights at ranges that exceed that parameter.
Full auto has a reason for being,,,,,on a rifle one is better served with a burst limiter if the shooter can't or won't use trigger control and limit themselves to a three or four round burst.
Oh, by the way, M16 rifles are a blast to shoot on full auto!