ADE Advanced Optics – Red Dot Mounting Plate for Ruger Mark I II III IV Pistols – Compatible with footprint Red Dot Sight – For Vortex Venom/Viper/Razor, Meopta, Insight, ADE RD3-006, RD3-009, RD3-012

Fit perfectly and appears to be of high quality.

Does not fit Vortex Venom at all. WASTE OF TIME AND MONEY.

It works perfectly on Ruger MK IV with Holosun optic.

Secured perfectly to my Ruger MK II. Used the shortest screws. Made of metal. Nice quality.

fits on gun great but does not work with rmsc footprint red dots

This is a very good optic plate for the Ruger Mk series pistols. It has several options for different optic cuts, I am using a Primary Arms SLX RS-10 and it fits great and hold zero.

i have the riger mwrk 4 hunter and the screws are too long and make the gun jam they also were poorly threaded and causes the edges of the holes to mushroom out at the edges a bit.

I Have a Ruger Mark 4 Competition and the Screws are too long and hit the slide and ruined my recoil spring. This mounting plate is too big and is made for a specific red dot. Even if i could mount it I couldn't attach my red dot that I bought.