The only upgrade I’ve made lately is a bunch more 8 round mags to my pps. I walked into gander mountain one day and there they on sale. Its a cc so better to have extra loaded mags than boxes of 9 mm ballast. Total I added five and come out at 11. A couple of short grip, a medium and 8 full size mags. They all fit nicely in a little black 511 bag. Usually I take a small knapsack on longer trips. Also a hiking pole or 2 that extend to the desired length and are super light. I might carry a 22 backpack rifle occasionally but nothing full size although I’ve been rethinking that lately with a new stoeger 12ga coach gun. It breaks down into two manageable pieces and with Winchester pdx1 defender ammo or double ought is good enough for what it’s for.