It was purportedly (and probably in actuality) intended as a survival aid to be used after landings and before recovery in the Siberian wilderness, although allegedly was intended as a defensive weapon against in-space attacks by the US space program.
They say it was because their landing in the wilds of Siberia may require defense against wildlife. This is not true. The truth is that they have seen what resides in space, and would not venture into it’s laid unarmed.
So… They watched Aliens?