Zparts feature their URGI/MK16 G-Style Handguard that can ba used on GHK, KJ, KSC/KWA, MARUI, SYSTEMA, VFC, VIPER, and WE AR-style airsoft rifles. According to them the MK16 Handguard is precision machined using 6061 Aluminum, Barrel Nut using 7075 Aluminum and the MK16 Barrel Nut is finished in hardcoat anodized.