A good option might be these high powered airguns strong enough to drop a moose. Like the .72cal Zeus, it has the same muzzle energy as an AK-47. As long as you can get your hands on lead, you can make your own ammo.

The AR-15 is probably the best all-around anti-personnel weapon ever devised. There’s a reason the powers that be want them out of civilian hands.

But yeah, how many rounds do I get to carry?