Drums are combat ineffective because they notoriously jam. Even a professional would be forced to abandon the weapon in that type of situation. That's why professionals don't typically use them.

I've only seen one video of that night and it was the shittiest quality cell phone. The whole thing looks staged as a large man being escorted by an officer has blood on his shirt but no torn clothing and the camera man points and says he was shot as he begins to stumble outside (looks like acting) where the crowd was.

FBI Psyop