The comments suggest that the only way to get the muzzle flash is by using blanks, thus proving hoax.
Just as a "passing comment"?
I think that "MOST" so-called "conspiracy theories" rely on such tactics....the "TACTIC" of .....
"THROWING BULLSHIT at the wall, and seeing what sticks".
Just my two cents (or, "tuppence")...and I am just posting as I "pass by" this thread. Others certainly might chime in, with more experience.