Humanities weakness.

You duck over to the side, rolling quickly as you hear your flesh and clothes tear as the beats sharp claws slam against your shoulder and back. You roll onto the snow, falling onto your back as it attempts to claw your chest next, your rifle is already raised and pointed up at the bottom of its chin and its arms are in a way that makes it a death wish to attempt to roll to the side again. Do you fire or attempt to block?