Cops don’t need full-auto weapons under ANY circumstances.
If bad guys have full-auto, the cops need good scoped bolt-action rifles chambered in .308 Winchester or .30-’06.
Very little body armor will stop those, and I don’t think there’s a face-mask in the world that’ll stop them.
They did have to go get addition weapons for the California bank robbery. They were outgunned when the two perps had full autos and full body armor. Know the police will not be allowed to carry full auto soon ... here in the states but when outgunned by something and someone with full auto would certainly be handy to have one in the trunk if one could get there to the trunk. The two perps were finally taken out with head shots. Bullets were bouncing off the armor the two perps wore.