She and her friend are VERY fortunate that the only thing not left from that incident is the rife.
I remember reading a story of a couple US Airmen stationed in the arctic. On their time off, they decided to go polar bear hunting with an M1 Garand.
They never returned to base. A search turned up the rifle, 8 spent shell casings and a lot of blood, but no sign of the Airmen.
The rifle seems similar to a Stevens “Little Krag”, but it is hardly definitive. The stock seems to have a slight pistol grip, while the “Little Krag” has a grip shaped by the extended trigger guard.