The TandemKross Challenger Bolt Knob is a precision-engineered upgrade designed specifically for Ruger American Gen II rifles providing enhanced bolt manipulation and improved cycling performance.TandemKross Challenger Bolt Knob for Ruger American Gen IIBlack anodized finish for durability and stealth appearanceCompact dimensions: 1.10 x 2.05 x 3.00 inchesPrecision machined construction for reliable operationEasy installation bolt handle upgradeThis aftermarket bolt knob enhances the functionality of your Ruger American rifle offering improved ergonomics and faster bolt cycling for competitive shooting hunting and tactical applications.