Some firearms are more appropriately suited to a SHTF situation than others. And for various reasons.
Hence the discussion. – Whirl..

Firearms are a toolbox. You choose the correct tool for the job. Hunting requires one type of firearm. Street fighting requires another. No one weapon can do it all. But, I’m preaching to the choir..

That said, I think the “best” firearm for SHTF is the one you can hit with and are most comfortable with… like the old saying goes “Fear the man with only one gun”….

The wicked flee when none pursueth..." - Proverbs 28:1