Volquartsen Firearms HP Action Kit for Ruger 10/22 and 22LR Black Add Plus Kit. Reduces trigger pull down to approximately 2.25 - 2.5lbs. Specifications for Volquartsen Firearms HP Action Kit for Ruger 10/22 and 22LR: Manufacturer: Volquartsen Firearms Color: Black Condition: New Country of Origin: USA Gun Model: Ruger 10/22 Caliber: .22 Long Rifle Package Contents: Volquartsen Firearms HP Action Kit for Ruger 10/22 and 22LR Target hammer (includes shims and bushings) Hammer spring Target disconnector Target sear Target trigger Polished plunger Spring with overtravel adjustment Recoil buffer to reduce wear on the action and bolt What firearm models does the manufacturer say Volquartsen Firearms HP Action Kit for Ruger 10/22 and 22LR is compatible with? The manufacturer says that Volquartsen Firearms HP Action Kit for Ruger 10/22 and 22LR is compatible with Ruger 10/22Volquartsen Firearms VC10HP-B-10-P: HP Action Kit for Ruger 10/22 and 22LR Black Add Plus Kit