If an AR15 is legal for you, I'd trade both of the rifles on an AR and a .22lr conversion unit for it. There is a .22lr conversion for the Browning 9mm, too, altho I would not get the browning. Its feed ramp is too steep for reliable feeding with some types of ammo. Most of them, the thumb saftey is too small, the sights suck, and the trigger pull sucks on all of them.
I'd Get a commander length 1911, .45 is easiest to find, alloy frame preferably, and get a Ciener Firearms .22lr conversion unit for it. You can get 9mm parts for it (ejector, slide, barrel, magazine, recoil spring, rs guide, rs plug, barrel, link and pin, extractor, firing pin and spring, from Numrich Arms (Gun Parts Corporation, they have a forum) if .45 amm or reloading components are really hard to get. The Govt model length is a bit heavy and long for concealed carry, and sooner or later you will want/need to do that. the alloy Commander is a bit jumpy in recoil for beginners in .45, so it needs light charge reloads. to start out with. Use the $200 .22lr unit for the first 5000 rds or so as you practice.
The shotgun really serves no purpose, other than for snob shooting of birds out of the air. birds all land eventually, and few are worth the expenditure of a shotshell, or all that noise. Maybe a turkey, but a turkey can be taken with the .22lr unit in the AR, and done so with much less cost or noise, too. It's feasilbe to carry one rifle and one pistol, and a .22 unit for each. The caliber swaps take 20 seconds. So if you want to quietly pop a squirrel and not scare every deer in the woods, switch calibers. for shtf, it's much more feasible to carry .22 ammo than 3006 or 12 ga. The 223, using good softpoints like the Nosler Partition, work fine for careful shots at the rib cages of deer, to 150 yds or less, and at bowhunting distances, can drop moose or bears with brain shots, too.
When you are dealing with a dog pack, a bear, a rabid animal, or men, you don't want either a bolt action or the severely limited range of a shotgun with buckshot. a 12ga with slugs is just a very poor rifle. The ammo for it is so expensive that you wont' be very good with it, either.