This Volquartsen Competiton Bolt Recoil Rod & Spring is designed to fit the Volquartsen Competition Bolt (Item VC10BLT). The Recoil Rod is heat-treated as a solid rod and then precision ground, eliminating any distortion that may take place during heat-treating. This process results in smoother cycling for a more enjoyable shooting experience. Three recoil springs included: reduced (bright), standard (dark), and heavy (gold).