Ruger Quick Detach Ring Set for: RUGER HM77R, RUGER HM77RS, RUGER HM77RSPHAB, RUGER HKM77RFP, RUGER M77, RUGER M77 MKII, RUGER M77RSEXP MKII, RUGER M77RMS MKII, RUGER KM77FRTG, RUGER KM77MKII, RUGER KM77MKIVT
Additionally, these scope rings work with both Ruger M77 magnum and standard cartridges.
