Our Tippmann approved f/x "SD" Barrel System. We start with our new Rf/x 10" Internally Rifled Barrel, and add our f/x SD shroud cover for the ultimate in performance and appearance. Built from 6061 T-6 Aluminum, with a matte black anodized finish. SD barrel systems are now available for the Tippmann Model 98. f/x SD shroud covers are also available seperately to fit the A-5 Flatline barrel. **TEMP OUT OF STOCK ON 10" BARRELS - SD SHROUD AND ALL ADAPTERS ARE AVAILABLE.