Fits Ruger blued models:
M77 FRBBZ Frontier
No. 1-A, I-RSI & I-S
77/50RS
No. 1-V & 1-B
10/22 Mag
10/17HMR
96/44
77/22 to .22 long rifle & .22WMR
77/17 to .17HMR & .17HM2
99/44 Deerfield
77/22RH
RSH Hornet
77/44RS
Mini-14 & Mini Thirty Ranch
Redhawk RH44R
PC9 & PC4 Carbine
MK II & MK III pistols