Williams Gun Sight Ruger MK II, III or IV 22/45 Lite and “Bull Barrel” Pistol Sight Set.

I bought this to go on a new base model Ruger Mark iv 22/45 (not the LITE). And it’s GREAT! FIRST, and MOST IMPORTANT: I stumbled across a 2 page illustrated and much simplified install procedure for the Williams rear sight on the Tandemkross web site (they sell this same Williams set). It makes the process of putting in the fiberoptic rear sight immensely easier and quicker, without the need for drifting out the entire sight from the dovetail, and saving yourself some money too if you were going to have a gunsmith install it. You only need a small flat blade screwdriver to accomplish the task. This is a huge tip! (And I love Tandemkross stuff.) It was a proverbial piece of cake, and took me less than 2 minutes to do it. Here's the link: https://www.tandemkross.com/assets/images/Instructions/Williams%20Fire%20Sight%20Installation%20Instructions%20-%20Post%20July%202018.pdf Note: according to the info from Tandemkross, this install method works only for Mark IV, Mark IV 22/45 and Mark IV 22/45 Lite manufactured after July 2018. Continuing my review: The two fiberoptic dots on this Williams set, installed as above, are at essentially the same height as the proper place for front-back sight alignment (per Ruger) on the original Ruger sight. However, there is a difference between the height of the factory front blade sight and the one that came with the Williams sights. The the factory sight at the point you’d normally line up with the rear sight, the highest point, sits 9.7 mm (3/8”) above the top center of the barrel (according to my not so expensive micrometer). The Williams replacement front sight measures only approximately 8.4 mm (about 21/64”) from the barrel top to the front fiberoptic. I worried that I wouldn’t be able to make enough of an elevation adjustment on the rear sight because of this >1 mm difference, but a trip to the range showed no problem (at 10 yards, the only distance I checked). I had also installed a rail on the top of the gun (Ruger 90623 1913 Picatinny Rail, from Amazon) for those times when I might want to put on a red dot (probably on a quick-detach mount). I worried that when the red dot was not on the rail would at least partially block the line of sight from the rear to the shorter front sight. That was not a problem either. I do have a bias for Hiviz fiberoptics, but as best I can tell Hiviz doesn’t sell a front-back sight combo for this gun, and although I could find the correct front sight I couldn’t find one for the back with a total cost close to what I paid for this Williams set. I'm completely satisfied with this purchase.

Very good part

I purchased this sight because it came in a set at a good price. Documentation did not say it would fit a Ruger MKI with a bull barrel but it does fit perfectly. The old sight drifted right out, the new right in, using a nylon hammer. (Note: the new sight top can be disassembled and used on the base of the old sight without need to drift out/in the old/new sight base. Just remove the roll pin on the sight.) The two set screws for the dove tail lock are seriously too small. It took me longer to find that tiny wrench than it did to install the entire sight package. Front sight uses the factory screw and fits the bull barrel perfectly. Use of Loctite recommended. I had considered the TruGlow sights, since they have a slightly bigger light tube set up. Easier to pick up by older eyes. They did not have a package set to fit my gun and the price for front/back sight combination was more than this sight. The Fire Sight is actually pretty bright out doors in light so it will meet my needs for varmint control around the homestead.

Excellent sights. Good visibility for older eyes. Easy to adjust. Williams makes good products.

I received these sights quickly. I chose to let my gunsmith install them. He works at a range, so I was able to immediately shoot after picking up my Ruger Competition Mark IV. My shooting was instantly better with these sights. I was scoring 15% to 20% better with these sights. I highly recommend them.

These sights provide a more visible picture for my aging eyes. The quality is excellent. The design requires filing and hand fitting for my Ruger MK II. I opted to pay a gunsmith for the install.

The lighting at my indoor range isn't the best for my 84 year old eyes. I can now confidently hit that 1" circle at 10 yds about half the time. Was an easy install.

Yes the sights were what I expected. I choose to have a gunsmith install the sights mainly because on my ruger mark 3. the dovetail on the rear sight was very tight and didn't want to damage the pistol.