Bolt Airsoft unveiled early this month two models from the Sportline Series. They come with the Enhanced BRSS (Bolt Recoil Shock System) which means a stronger recoil feature though we do not know if this is different from the BRSS Heavy they had before. These have polymer polymer handguards and stock, front-wiring, BMAG 140R Silent Magazine, and whoa! 6.00mm Precision Inner Barrel.