Here is my Topper 30-30. The barrel has been cut to 16.5 inches and weights about 5 pounds.
I reload 113 Lee cast bullets at 800 fps for small game, it's functionally my .22 rf at a time when .22s are hard to come by. With 165 cast loads at 1,800, I have killed lots of deer and feral pigs. And in the event of need, factory .30-30 is easy to come by.
For a true 'survival rifle' I would install iron sights to back up the Bushnell TRS-25.