GOG Freak Carbon Fiber XL Barrel - Ion Thread Size:16" They are specifically designed to

They are specifically designed to provide you a comfortable

back shell and bottom shell into a single hinge-mounted unit

The FS Hero Air Systems all carry a UN ISO certification

Super compact

Water Resistant Electronics

GOG Freak Carbon Fiber XL Barrel - Ion Thread Size:16" They are specifically designed toComes with a Carbon Fiber Freak XL Barrel and 0. 689 Insert The Freak Carbon gives you all the advantages of the Freak System at a fraction of the weight. Because of the high quality carbon fiber used in its construction, the Freak Carbon can utilize full sized porting not found on other carbon fiber barrels. Full sized porting means this doesnt shoot like a carbon fiber barrel, it shoots like a FREAK.