I just moved here in 2013 from Illinois. From the reading I've done of Missouri's hunting regs, they're more open to using a wider range of weapons. I couldn't find the answer either way, as to whether or not it's okay to use air guns for small game like squirrel or rabbits. Mind you I'm not talking about toy bb guns you often find on the selves of Walmart. I sold my Benjamin Discovery rifle, but still have my Crosman Custom pistol (14" barrel .22 caliber). Some day, I'd like to replace the Discovery with a Marauder, or AirForce Condor.