Dont let anyone talk you out of this upgrade. Way better than stock sights. Just remember, when removing rear sight, loosen the 2 set screws and push the dovetail out from the left side to the right. Buy this! They are fantastic.

The sights work great however I had to modify original screw to hold the front sight it would have been nice for the product to come with a replacement screw. Shipping was fast, and I recieved a sticker with purchase...more companies need to do that.

Installed on a MK IV. Had trouble removing front screw that had factory threadlocker on it. New sights installed easily and perform perfectly. Much easier to see than factory "black on black" sights.

excellent product for the money. very good service and helpful assistant on phone conversation. most pleased.

These are very good sights for the price. I put them on a ruger mark 3 hunter. The rear required quite a bit of fitting but worth the results.

Great sights...love the front post. Big improvement for aging eyes from factory sights.

Had my fire sights installed by a professional gunsmith and when I got it back I was very amazed and happy because you can sight in in an instant on a target with these especially with the front sight being red and the back sights being green fiber optics. If I buy another pistol that has iron sights on it I will be replacing them with Williams fire sights. When your iron sights are black and your target is black makes it very hard to acquire the target fast Absolutely recommend them to anybody who has iron sights.

All in all I would have to say the purchase was very smooth with shipping and delivery taking a bit longer than I would have liked.The sights are a nice upgrade over the stock sights on my Ruger Mark 4 Target. One thing to keep in mind is that these sights require ambient light to glow like they do....so, if your shooting at an indoor range and the lighting right where your standing isn't so great...the sights really don't glow very well. The range where I shoot has an adjustable light in the stall, so I was able to just crank up the light and really wake up these sights to glow like their supposed to. I've not shot outdoors with these sights yet, however I would think that it would be fine as long as there was enough sunshine around to light up the fiber optics.

I love these sights. My eyes are getting old and these help greatly in getting a quick, clear sight picture. This is the third gun I have installed them on. They fit well in the dovetails on the Ruger Mark IV with no fitting required.