Good question. And judging from the video, I wonder how many rounds hit him in the back.
How many of them hit their intended target?....Probably not may. In 1977 I saw this coming. Some departments in our area went to automatics to “match the criminals’ firepower.” At the range Us guys with ‘wheels’ shot six rounds in the”x” every time. The auto’s fired all sixteen rounds (in very close to the same time) and maybe got 2-3 in “x”. I remember thinking there is going to be a lot of ricochets and background hits soon.