I actually just got rid/sold my 300Blackout AR. it was basically just sitting in my closet not being used, so I sold it. It was not really on the bottom of the list per se, it was just the rifle that made most sense to sell. Ammo is still relatively expensive compared to 223Rem and is mostly available online only.
not to worry to because it was replaced by another Mosin.
Wife... what wife?