The AR platform is a good choice for those placing availability as a priority. Lots of ARs around as well as parts and accessories. .223/5.56 is plentiful. While more efficient calibers are now upstaging the .223/5.56 in performance, stockpiling ammo in these newer calibers is a lot more expensive and resupply later on may be impossible if laying in a supply is your goal.
I once owned a HK91 in 7.62. It was heavy and clunky, and I never jelled with it. Didn’t keep it long although now I wish I had simply because of what they are selling for these days.
The FAL is a sexy beast, but a beast none the less due to its length and its weight. I’m with you, WB. I wouldn’t want to have to tote one around all day, even the Para version. You may have been the only LEO in the country who carried one in your car!