The BX-Trigger? is a light crisp "drop-in" replacement trigger assembly that is compatible with all Ruger 10/22 rifles and 22 Charger? pistols. The BX-Trigger? is a Genuine Ruger Factory Accessory and is the perfect upgrade for all 10/22 rifles and 22 Charger? pistol models because of the significantly reduced pull weight of approximately 2.75 lbs. (versus 6 pounds on the standard 10/22 trigger). The BX-Trigger? is sold as a complete assembly that drops in to replace the existing trigger assembly. A video of the installation process can be found at Ruger.com/BX-Trigger. Genuine Ruger Factory Accessory