Ade advanced optics mini red dot sight mount base, ruger sr22 pistols, black, ruger sr22 plate - ADE Advanced Optics Mini/Micro Reflex Dot Sight Mounting Plate for Colt 1911 Standard

I purchased the ADE Advanced Optics Mini/Micro Reflex Dot Sight Mounting Plate for a Ruger SR22. I do not recommend this mounting plate for the SR22. The base or tail of the dovetail on the mounting plate is much smaller than the socket of the dovetail grove in my SR22 slide. This allowed for a noticeable gap between the base of the mounting plate and slot in the slide. The problem is the mounting plate/Red Dot pivots forward/aft/up/down over the set screws of the mounting plate in the slide. The mounting plate/Red Dot would not hold its position and no way to sight in the Red Dot. I contacted ADE Advanced Optics and they recommended to place a shim between the slide dovetail socket and the dovetail base of the mounting plate; a 0.013" shim was required.

After 200 rounds and not being able to group my shots, even at 5 yards, I removed the mounting plate from my Ruger SR22. I was also not comfortable with the lack of mating surface area between the dovetails of the mounting plate and the slide. I measured the width of the mounting plate dovetail base and SR22 slide dovetail socket. The mounting plate dovetail base is 0.520" and the dovetail socket in my SR22 slide is 0.530". I think this was allowing the mounting plate and red dot to continue moving, even with the shim and set screws tight.