Twisted Silverback external barrel for TAC-41 420mm replicas Premium aluminium 6000 construction delivers lightweight performance without compromising durability. Hard-anodised finish resists scratches and corrosion, while the distinctive twisted pattern gives your replica a tactical edge. Engineered for precision fitment with AEG 420mm and GBB 417mm internal barrels. M24x1 CW threaded connection ensures secure installation. Package includes two 20mm spacers (SRS-compatible) and thread protector for complete setup.