Rifle Basix RU-R Trigger for Ruger 77/22 Variants - BlackWorks with models 77/22, 77/17, 77/44 and .22 Hornet. Adjustable to 1.5 lbs to 2.5 lbs.Rifle Basix Ruger Trigger for bolt action rimfires is completely drop-in, user installed. Unique eccentric tip safety adjustment screw to accomodate factory tolerances on three position safeties. Complete with instruction sheet and hardware.