Hiviz HRB2007 Ruger MK II/MKIII Frnt Sght MKII/MKIII. Also fits: Ruger 22/45 with adjustable rear sight (does not fit the 22/45 LITE); Ruger Single-Six revolvers with adjustable rear sight; Browning Buck Mark pistols (does not fit the Challenge 5.5...
Hiviz HRB2007 Ruger MK II/MKIII Frnt Sght MKII/MKIII. Also fits: Ruger 22/45 with adjustable rear sight (does not fit the 22/45 LITE); Ruger Single-Six revolvers with adjustable rear sight; Browning Buck Mark pistols (does not fit the Challenge 5.5...