Currently the M6 Scout is the only factory rifle that fits this niche, and they are rare/expensive as hell, and do have some inherent issues. Several rifles/shotguns targeted towards the 'survival' crowd are available on the market but, IMHO, many have major drawbacks such as a proliferation of plastic parts, flimsy sights, poor actions, etc.
IMHO for a 'survival' gun the hinge-action is ideal. it is rugged, totally reliable, inherently a takedown action, and is extremely compact: a 14" barreled hinge action would be shorter/lighter than a 10" barreled 10/22.
a sight combo similar to the XS sights rail/ghost ring combo is not offered on any .22LRs, and would be ideal for a gun like this. those who prefer can mount a compact scope or a reflex sight, and due to the hinge-action design the sights/optics would retain zero even after takedown/reassembly, and not suffer from any receiver:barrel play issues like those plaguing shotguns, 10/22s, etc.
the barrel length/stock LOP could be tailored to come in at just over the min. OAL for non-restricted. it would result in a bombproof, compact and accurate 'survival' rifle platform, and also be ideal as a plinker and youth rifle.
i made the concept using a .22 from the Rossi Trifecta package, with a shortened stock LOP and barrel. the sights are XS sights ghost rings. both of these items are easily acquirable if a 'reference' is needed for the design.
just putting this out there as this is my idea of the perfect backpacking/survival rifle, and you can put me down to preorder two of them if you can build them under $400, and im sure they would be very popular with the backpacking crowd. down the road, a short 20ga barrel could also be offered to round out the kit. .22 Hornet could also be a possibility, as could pistol calibers such as .44 mag.