The Christensen Arms Tactical Aluminum Hardcoat Anodized Bolt Knob is a precision-engineered upgrade designed to enhance your shooting experience. Crafted from durable aluminum with a hardcoat anodized finish this large tactical bolt knob offers exceptional grip and reliability. Standard on Christensen Arms MPR TFM BA Tactical and ELR rifles it ensures smooth and efficient bolt operation when it matters most. Built for performance and durability this bolt knob is the perfect addition for shooters who demand precision and quality in every shot.