Volquartsen Firearms OpticsPlanet Exclusive Automatic Bolt Release and Recoil Buffer Bundle for Ruger 10/22 Black. This eliminates the need to push up on the bolt lock mechanism to release the bolt. This is an easy drop-in installation. Available in silver or black. Please note: our bolt release is only compatible with Volquartsen and Ruger factory bolts and trigger guards including the BX-Trigger. It is not compatible with other manufacturers parts. Drop-in polyurethane bolt stop pin eliminates the metal to metal contact between bolt and receiver and eliminates vibration caused by this. The recoil buffer also provides a remarkable difference in cycling noise. Replaces factory bolt stop pin. Specifications for Volquartsen Firearms OpticsPlanet Exclusive Ruger 10/22 Automatic Bolt Release and Recoil Buffer Bundle: Manufacturer: Volquartsen Firearms Gun Model: Ruger 10/22 Color: Black Features of OpticsPlanet Exclusive Volquartsen Firearms Ruger 10/22 Automatic Bolt Release and Recoil Buffer Bundle Marked variants are available exclusively from OpticsPlanet Package Contents: OpticsPlanet Exclusive Volquartsen Firearms Ruger 10/22 Automatic Bolt Release and Recoil Buffer Bundle What firearm models does the manufacturer say Volquartsen Firearms OpticsPlanet Exclusive Ruger 10/22 Automatic Bolt Release and Recoil Buffer Bundle is compatible with? The manufacturer suggests that Volquartsen Firearms OpticsPlanet Exclusive Ruger 10/22 Automatic Bolt Release and Recoil Buffer Bundle is compatible with Ruger 10/22Volquartsen Firearms VF10B02: OpticsPlanet Exclusive Automatic Bolt Release and Recoil Buffer Bundle for Ruger 10/22 Black