If the BB Gun interests you, you should look into other weapons in the same class.

The infamous Rubber Band Gun

I would say sling shot, but the sling shot might actually kill someone with the right object loaded into it.

Spitwads are about as good

Darts, once again would probably be a move up in class.

water balloons might get their attention and be in the same class as the b b, that is unless you load a much ore deadly liquid in them, and then it would also move up a class in defense.

a frisby might really smart like a bb.

Throwing your shoe would also be about the same