The Umarex Primal 20 has an onboard 4,000 PSI air tank, that pushes a 20-gauge 395-grain slug to 700fps at the muzzle. In other words, you’re getting a whopping 430 foot-pounds of force. That is more than enough to take deer or similar sized critters. The staff at the booth told me they had successfully hunted a Red Deer with the Primal 20, at a range of about 65 yards. It is fully ambidextrous, and the charging handle can be reversed by simply unscrewing it.