[Enlightened1]

The cops appear to have M4s. Towards the end of the video you can clearly see one cop kneeling with it. Here is a picture of a M4 in case you are wondering.

[notdownwidems]

That’s beautiful!

[mulnir]

M-4’s are select fire and fitted with a 14.5” barrel,the posted picture does appear to have a sear pin (which would be directly above the safety selector) and the barrel also appears to be 16” judging by the fact that the hand guard is long enough to cover the gas block. I would suggest that the picture is of a civilian AR-15 type carbine, and not an M4.