Have a look at this:
http://www.youtube.com/watch?v=LMtlFyLLnYA
From how this was explained to me, he effectively re-rolled an attack until it was a crit, then fired - so there's a bit of a delay between clicking and firing, but.. constant crits.
No comments on the guy being a terrible soldier.
Ofcourse it's easy to spot, but you could bind the program to a key to crit when you wanted to.
this will be patched soon
