Evanix REX HP RTG .50– Evanix Rex Rifle .50 is designed to be a backpacker at only 5.51 lbs. Break it down by simply unscrewing the tank and it easily fits in a backpack. (You need to remove the rail and loosen the set screw before taking off the tank) The Rex is lightweight and comfortable to shoot. Don’t let its size fool you. This airgun is powerful! It comes in many different configurations and is an under-lever action. The AR15 style grip is interchangeable with AR15 grips, allowing you to mount your favorite AR grip. Take a couple of tanks in your pack and you have a lightweight hunter with plenty of shots. We have now added a Hawke 4-12 Vantage scope with scope rings and a box of 336gr hunter supply ammo and a Vevor 3 stage 4500PSI hand pump. After you get every thing put together from the shipping box you are ready to get out in the field.