When it comes to home defense, I’d definitely use the 5.56. It’s the one I’ve spent the most time practicing with, and I find it much easier to handle indoors. Plus, it just feels more reliable overall. With quicker follow-ups, less muzzle rise, and a ton of solid defensive ammo options, it’s a no-brainer for me. On the other hand, the 7.62×39 is more of my “fun and practical range gun.” It’s not that it can’t be used for defense, I just don’t think it performs as well as the 5.56 in that role.