https://www.varusteleka.com/en/product/terava-skrama-carbon-steel/30189
For starters, stick a 20 inch barrel on your AR15 with a 1:8 or 1:9 twist if you want to really get the essentials covered.
Your Polymer80 is useless if you can't actually use it for self defense barring home/property and you intend on carrying it. Using a .22 pistol for concealed carry is better than nothing, but you should avoid doing it outside of necessity.
I think the better thing to look at when considering a CCW is your climate and your size. A guy who's six foot four and lives in Maine can comfortably carry a much larger, heavier pistol under thicker clothing with less printing than a Californian manlet wearing skinny jeans.
If you want a more portable 10/22, try getting one of the takedown models.
Need to include your budget with your post