'leader' gets a pistol, only grunts carry rifles! Apparently, hollywood is under the impression that pistols are the sportscars of the gunworld, and the rifle is just your average everyday sedan. Of course, we all know that if a rifle is your average sedan, a pistol is a vespa scooter, oh, and there are some sedans that are far from average.
also, act casually, shoot casually, it is cool. I am thinking of the execution by pistol scene early in the clip, where the shooter doesn't even look at the guy, simply locks eyes with another, raises his arm to the side and shoots the target square in the head. I know this 'casual style' is just acting, the director wants the audience to infer information from how this act is committed, the fact that even the most callous cold-blooded casual killer...or even a guy shooting rats....is going to need to look at his target if he wants to hit it, and aligning the sights sure will help