There is a giant difference between civilian law enforcement and disaster aid. Plenty of people were happy that my former squadron's helos picked them off rooftops after hurricanes. We've got the people, training, and equipment, we should help.
Any posse comitas action like people on here fear would be pretty messy in the military. I have faith in a great many of the officers I've interacted with to do the right thing. Some would follow orders and take all the guns. Us enlisted scum are prety split, I did meet some that were scared of guns, scared of civilians etc. On the flip side the biggest gun/RKBA nuts I've met, me included, were military. So, if the military gets tasked to take all the guns, don't worry, the resistance will have lots of nice equipment. Maybe a few intact units.