For a home defense gun get a Red Dot or Holo. ( an Aimpoint or EOTech, not a "blue light special."
They would we superb for TEOTWAWKI as well.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."