Bob Campbell published an article with USCCA about a month ago on the merits of the AK for home defense: https://www.usconcealedcarry.com/blog/eastern-cousin-ak-rifles-for-home-defense/ I thought he brought up some fair points. A home defense rifle, or truck gun for that matter, is ideally something that is easily stored out of the way and requires minimal maintenance. An AK with folding stock naturally satisfies this requirement. In regards to accuracy, the AK is good enough. Self defense usually means shooting inside of 50 yards. Sub MOA accuracy just doesn't buy you any advantages at such short distances. He spoke of 7.62x39 as being a "harder hitting" round, while still having manageable recoil. I get what he means, and I don't disagree. However, in my research it would seem that the lethality of a particular cartridge is more nuanced than bullet size and/or muzzle energy.