Except It Is

"A masterclass in propaganda. One photo, zero context. The caption says “terrorized innocent man.” The reality - he grabbed the officer’s weapon moments earlier, and that’s pepper spray, not a firearm. This is how outrage is manufactured."

Chef Andrew Gruel on X

Except that 37mm is most certainly a firearm.

There's vid of that officer with something sticking out of that barrel fountaining orange smoke that the scared guy REALLY reacts to.

Are there riot rounds that pop out the end of the barrel and spray CS smoke?  Dunno, but it seems possible.