I’m a fighter too. Just have to seize the right moment if looking down a gun barrel.
If I am looking down a gun barrel, I am going to assume that the person holding it is going to fire momentarily, therefore anything I can do to kill, injure or incapacitate (and maybe all three in reverse order) them is completely justified.
If they don’t kill me, I will personally see to it that the remainder of their and their families’ lives are filled with lawsuits and anything else terrible I can come up with.