.22 rifle suggestion (squirrel control)

[Great-Kazoo]

http://www.budsgunshop.com/catalog/m...71899/redirect

With a .22 can

No threaded bbl & detachable magazine

I'd also lean twords an air rifle.

Discharging an air rifle is the same as firearm, there's a 10 day wait for firearms. The bb gun or air rifle would probably be a better option as "ammo" for it's more available and cheaper then 22.