The Timney RPR rimfire trigger is a self-contained 100 percent drop-in trigger ready to install in your Ruger Precision rimfire rifle for an exceptionally smooth crisp two-stage trigger pull. No gunsmithing. Pull weight is factory calibrated for a half-pound first stage and a one-pound second stage First stage is user adjustable from 8 ounces to 1 pound and the second stage is user adjustable from 8 ounces to 2 pounds Housing is constructed of military-grade 6061 T6 alloy that is CNC machined using state-of-the-art robotics and is anodized for superior durability CNC machined heat treated and coated Sear is wire EDM cut heat treated to 58-60 Rockwell and Teflon-nickel coated for lubricity and dependable long-lasting service life Offered in two models - #649 curved shoe and #649ST straight shoe