Fully calibrated and ready to use, the Timney Replacement Ruger M77 Single-Stage Trigger is an easy-to-install drop-in trigger upgrade offering user-friendly service at a reasonable and cost-effective price. This trigger is fully adjustable for sear engagement (creep) and allows users to adjust the trigger pull weight to fit specific shooting preferences. Compatible with Ruger M77 tang safety models. Lifetime warranty. Made in USA.