here is the video..in another one with a different angle you hear him yell out multiple times
DROP YOUR WEAPON
https://twitter.com/EM_KA_17/status/1266931731048861703
turns out he was Special forces.
they guy is impressive
https://therightscoop.com/insane-video-shows-antifa-idiot-grab-an-ar-15-from-a-cop-car-and-get-slapped-down-by-former-special-forces-guard/