Ammo got real tight up here too.
One of my buddies labels a portion of his ammo "war chest" It is for emergencies only and never gets fired, unless it's replaced first. Example when he's out of 223 he's still got 4000 rounds. I'm stealing a page out of his book and establishing minimum quantities that can't be used.
Parts and mags also got rather scarce for combat platforms, took me months to score a lower receiver and some part kits. Last pistol I bought I invested another 50% in spare parts and put them away. Plan to do the same with most of my firearms....especially anything that belongs in a bug out bag.