The Tippmann X7 Phenom Magazine Conversion kit from Tacamo turns your X7 Phenom into a full-on mil-sim paintball gun that accepts detachable ammo magazines just like a real black rifle firearm. This kit replaces both side of the X7 Phenom body. Your existing gun internals stay in the paintball gun. The kit comes with a 20 round detachable magazine. Other magazine sizes (including a large 250 round box magazine) are available. If you want to fire the gun in a traditional way, optional attachment s for both cyclone feeds and vertical feed hoppers are available separately. The main advantage is a smaller profile and an increased line of sight. There doesn't need to be a hopper attatched to the gun. Also magazines are "force feed", which are better than gravity feed hoppers.