Evanix Rex PCP Last Resort Carbon Micro Carbine 50 Caliber – The Rex Last Resort Carbon is a powerful Micro Carbine but don’t let its small size fool you. This little airgun packs a punch. Break it down by unscrewing the tank and easily fits in a backpack. (You need to remove the rail and loosen the set screw before taking off the tank) Take some extra tanks with you and you will have enough shots for a day of hunting. The Rex pistol is lightweight and comfortable to shoot. This pistol is an under-lever action and cocks with ease.