Mike Ehrmentraut, a trained sniper, is shown setting up a shooting position that is revealed by sunshine reflecting off of the binoculars that he is using. Not only would a sniper not choose such a position, they wouldn't attempt to make a shot facing the sun unless they absolutely had to.
In this case, there was no reason to shoot from that position. See more
Here's what's gonna happen. One day you're gonna get sick, again. And one of your employees is gonna find you, curled up in that space blanket-take you to the hospital. Hook you up to those machines that beep and whir, and hurt. And this time it will be too much, and you will die there. Alone.