The Timney Triggers Impact Ruger American Centerfire Gen 2 3-4lb Trigger 644C is a precision-engineered trigger designed for Ruger American rifles. This single-stage trigger offers a crisp, clean break with a pull weight adjustable from 3 to 4 pounds. The trigger housing is made from lightweight aluminum alloy, while the hammer is wire-EDM machined from S7 tool steel for superior durability. Easy to install with no gunsmithing required, this trigger enhances the accuracy and performance of your Ruger American rifle.