Survival rifle to me means a gun that pots food primarily. And, it has to be quiet. It has little or nothing to do with combat, or being lost in the forest.
So, any good .22LR that fits the bill. If I was to add anything at all, a suppressor might be first. Any of the older bolt action single shots make a just about perfect survival gun. Plenty of the newer guns would too. A couple of hundred rounds in the pack, and a good consistent eye and aim, you could stay out there for a long time with that. Small game, deer, and moose too. Polymer, scopes, I'd say yeah if thats your thing, but neither one is a must.