Ruger 90482 Precision Bolt Shroud Ruger 6061-T6 Aluminum This Ruger Precision Bolt Shroud improves your rifle's look and feel. The shroud houses a bolt disassembly tool and a trigger pull adjustment tool for convenient access. It is manufactured from 6061-T6 billet aluminum and finished with Type III Mil-Spec hard coat anodizing for strength and durability. Type: Bolt Shroud Model: Ruger Precision Material: 6061-T6 Aluminum Finish: Black Hardcoat Anodized