The Timney RPR Rimfire curved trigger is a self-contained, 100% drop-in trigger ready to install for a smooth, crisp, two-stage trigger pull. The pull weight is factory calibrated for a half-pound first stage and a one-pound second stage. The trigger housing is constructed of military-grade 6061 T6 alloy that is machined and anodized to provide durability. The trigger is also CNC machined, heat-treated and coated while the sear is wire EDM cut and Teflon-nickel coated for lubricity. No gunsmithing, fitting or adjusting is required.