Hi-Viz LiteWave Ruger Mark I/II/III/IV Front Red/Green/White Fiber Optic Handgun Sight

A: Robert, HiViz states these Fits: - Most Ruger MKII and MKIII - Some Ruger Single 6 with Adjustable Rear Sights - Many Browning Buckmark (Except Challenge, and 5.5" Target or Field Models) which should include the 22/45 Mark III. I would still verify this with HiViz before purchase at their "Sight Fit" email inquiry here : http://www.hivizsights.com/contact/customer-service-2/

A: yes if it is a 22/45 heavy (standard not tapered) barrel NOTE: Does not fit 22/45 Lite model HiViz Ruger Mark II and Mark III Interchangeable LITEWAVE front sight - Skeletonized sight body. *******Fits Ruger Mark II and Mark III heavy barrel guns including 22/45 with adjustable rear sight only, does not fit 22/45 Lite model. Also fits Browning Buck Mark pistols (except Challenge, 5.5 Target, and 5.5 Field). Will fit Ruger Single Six revolvers with adjustable rear sights. Includes three Lite Pipes in Red fiber optic family Lite Pipe, green and white and key to change Lite Pipes. The new LITEWAVE sight design from HiViz features an innovative, diagonal-wave design that increases durability to the protective exoskeleton and allows for more exposed surface area for the LITEPIPE to gather light from all angles, for the brightest sight available.

A: Yes, according to the Hi Viz sight it will fit the bull barrel MK IV's just not the tapered barrel versions. https://www.hivizsights.com/product/hrblw01/

A: Brayden, yes Sir. This Sight Fits Ruger Mark I, II, III and IV steel bull barrel pistols; 22/45 with adjustable rear sight (does not fit 22/45 LITE); Single-Six revolvers with adjustable rear sight. Also fits Browning Buck Mark pistols (does not fit Challenge, 5.5 Target, and 5.5 Field).

A: Yes it will fit IF your MK IV has the Bull barrel "Sight Fits Ruger Mark I, II, III and IV steel bull barrel pistols"