GOG Freak XL Full SS Boremaster Barrel Kit Autococker Threads Style:All American Spiral Ported Tip Metal Construction Suitable for Cybergun The Vortex Fan is Metal Construction Suitable for Cybergun M&P 9 Series Airsoft Gas Blow Back GBB Pistol Uses Green Gas The Fill station is a simply two knob system making it easy to use will enjoying a day at the range or while out in the field Freak XL hardshell case paintballs fired through the Freak® XL exhibited an average velocity increase of 6 feet per second compared to those fired with the same dwell timing and pressure through an original Freak® with the same bore diameter and porting