The only nice thing about those red shitholes is that it’s stupidly easy to get a gun. Get one. Join your local chapter of the SRA. Train at the local range at least twice a month so that you are proficient with it. Learn all the local stand your ground laws. Memorize them. When they start shooting, aim center mass.
While a pistol is far more portable, it requires far more training, as the lower mass of the firearm results in a larger than expected kick. Shotguns are really the weapon of choice for urban defense.
I personally have a couple of extremely nice sniper crossbows, that are basically silent. Seriously, the bolt impacting my target makes more noise than the bow. A couple of T-33s, an AA-12, and a 30-06. Lots of ammo too.
Learning how to reload your ammo is also invaluable, should they start shooting. Have a “riot shield,” basically the largest piece of steel you can easily carry that is more than 2" thick. Body armor is also a useful investment.