Monstrum Dovetail Red Dot Mounting Plate for Glock Pistols | for Non-MOS Version Glocks | Compatible with Glock 17 19 20 21 22 23 34 35 40 41 45 47 | Compatible with Docter Footprint Red Dots

This adapter plate has good fitment for my Glock. Easy to put in with a tight fit. It comes with a variety of fasteners to accommodate different lengths for different red dots. I recommend using a little blue lock tight on them as they did not come with any already on the threads. I am very pleased with it.

Why did you pick this product vs others?: Plate fits perfect on my Glock 20

This plate as a perfect fit for my G19 and my ADE optic fit with no issues.

Didn't fit well, wouldn't buy

fit as described and works well.

I'm not the biggest fan of dovetail-mounted MRDS mounts, but this seems to be okay for marksmanship training. It's easy to install and easy to mount, so that's not a big deal. I would be careful about actually using this for duty use. Repeated racking of the slide on something that only uses the dovetail to hold all that mass may inadvertently affect the zero. Granted, dovetail-mounted iron sights are pretty robust, but I am just suspect of how much leverage/force you can put on the sight/mount to wreck the zero. Otherwise, this will work fine for range use. It's a less expensive alternative to milling your slide and you can always return the slide back to factory.

Decent fit. Hardware and assembly not very good. I glued it to my gun because I was losing zero every couple hundred rounds. Buy only if there are no other options.

Perfect fit! All the screws you might need included. Great deal.