I have a Ruger MK IV Target, MK IV Hunter, and a MK IV Competition. I purchased a Shadow Mount for each. Need I say more?

Made well. Fits the mark 4 perfectly. Did not fit the red dot perfectly. Placement lug holes minutly different. Still. It works.

Fit perfectly, awesome product, thanks!

I have the Shadow Mount v3 on all my Mark IVs with Holosun 407C's and it's a fantastic mount, with a very tidy footprint.

I used this mount plate on my Mark IV 22/45 to lower the optic to bore distance and it works great! Easy to install the plate on the pistol and easy to install the optic on the plate. It makes a huge difference in using the red dot on the pistol. Mounting the optic on the factory pic rail made the optic feel very high from the bore axis and awkward to use the red dot. This plate made a world of difference.

If there is one fault with Ruger .22 Mark IV handguns, it's when they include the long blocky pic rail on the rounded receiver and barrel. Put one on the Ruger Hunter and you've just uglied up a gorgeous gun. Most models come with excellent adjustable sights, but c'mon guys, the BIGGEST reason we buy a .22 is their phenomenal accuracy. That means if you want to shoot holes into holes at 25 yards, you need a red dot. Using the pic rail requires an additional mounting plate that adds even more height from the bore axis, not a good thing. Tandemkross has the ultimate solution with this perfect plate. It's minimum profile compliments the guns looks and keeps the height from bore axis low as possible. You get everything you need to mount any red dot except the tiny filler screws that you can buy from Ruger for four bucks. When you remove the pic rail, there are three holes on top of the receiver, and the mounting plate requires the two rear holes, so you need a filler plug for the front hole. (Important Note: The filler screws do not bottom out, so only install them until they are flush with the top receiver.) All of the Tandemkross install videos are excellent, so watch this one, but the installation is super easy. As they say, use Loctite Blue on all screws and you'll have a sight that stays put. Once you zero in, even your grandmother will shoot X-ringers all day.

Nice clean mount. Had all hardware needed to install.

Very nice mount! Well made, looks good and perfect fit on my Ruger MK IV 22/45 Lite for attaching a Holosun red dot.

Perfect fit and it comes with everything you need to mount just about any optic, I mounted the Holosun 507COMP-GR which really makes this gun even more fun to shoot.