The concepts Mleake posted are exactly my thoughts, having done similar training. Yes, it focuses mainly on unarmed assailants, and shinai are easier to brush off than sticks or knives, but some of the tactics stay the same. Graduating to firearms you must definitely find cover, and fighting back without enough distance is likely going to lead you to being shot yourself, unless you're lucky enough to get a gun out and firing before one of them shoots you or grabs your weapon arm.
In the end, turn the snow red. How red is determined by those assaulting you. But these aren't like most animals, shooting/cutting/stabbing/bludgeoning the leader isn't any more or less effective than whoever happens to be the closest. Though, I've talked my way out of group beatings more often than I have ever had to use violence, so don't take my word for it...
