End of the world. Pick three firearms.

The_Chieftain: I'm quite a fan of my SIG 556. Though it's not actually my favourite rifle, it's effectively an AK47 made to Swiss standards which fires .223/5.56. I'll never need to take time away from surviving to clean the thing.

Some accurate semi auto .308 for hunting larger things. An FAL would do in a pinch, though I suspect better is out there. Finally, SIG Sauer P226 in 9mm. Reliable, not uncommon, easy to find ammo, good capacity, and I don't get on well with Glocks.