I am going to keep this simple and not get crazy with the accessories unless asked. My picks… 1. Glock 17, 9 mm pistol. Accurate, easy to support and maintain. You can squirrel away a ton of spare parts and you can buy 9mm in bulk. 2. Ar-15 with a 16 inch barrel. 1/8 twist with a 1-8 powered scope. You can do everything with this rifle, including hunt large game 200 yards and in. The optics and accuracy of that platform will allow accurate shots into the cranium of any large game in North America, plus there is nothing better for home defense. You can buy 5.56 in bulk. 3. .22 rifle. Perfect for hunting small game, training, and you can buy a ton of .22 in bulk. Or….skip the third option and buy another upper receiver for your Ar-15. A precision 18-inch barreled upper receiver with a legitimate 6-18 powered optic and a few cases of match grade ammunition. This would allow you to own everything in your prepper space out to 700 yards and double as a legit hunting rifle for medium sized game. Or…just buy spare parts for your Ar-15 and Glock 17. Magazines, barrels, bolts, bolt carrier grips, small parts etc.