The Compact Folding Survival Bow is a patent-pending one-piece takedown bow milled from T-6 6061 aircraft grade aluminum and fitted with fiberglass bow limbs. According to vendor Primal Gear the long bow that bends and tucks into a 23" short riser is the only folding bow on the market designed with survival in mind.
Henry US Survival Rifle, AR-7: Leave it to Henry Rifles to take a design and improve upon it. The AR-7 was the civilian version of an Air Force survival rifle designed by Eugene Stoner, which Henry acquired the rights to circa 2007. As you can see from the picture, the rifle disassembles and fits into its own buttstock which is “water resistant” (Henry claims it will float and it may but don’t bet on it).