Who or what is that?
He got up before sunrise and into his hide, then waited all day until the sun was at his back, then scoped the glint off the other sniper's glass, and put a hole in it.
from Wiki-
“One day, Zaytsev’s commanding officer called him up and pointed at an enemy soldier in a window 800 meters away. Zaytsev took aim from his standard-issue Mosin-Nagant rifle, and with one shot, the soldier was down. In less than a few moments, two other German soldiers appeared in the window, checking their fallen officer. Vasily fired two more shots, and they were killed.”