MonstrumRed Dot Mount Compatible with Mossberg 500/535/590/835/Shockwave Series Shotguns

Perfect fit on a Mossberg 930 and mounting a Burris Fastfire 3.No need for a cheek riser with this.

Rmsc plate worked perfectly to mount Osight S onto Mossberg 590.

The mounting plate arrived defect free and with a variety of screw sizes. The manual for my red dot required a docter footprint and my red dot fit perfectly. I used screws that came with the plate to secure the red dot (versus those that came with the red dot) with no issues. To mount the plate to my BPS, I removed the rib riser from the receiver and placed the plate over the holes. I marked and drilled those hole locations to a size just smaller than the included screws. I then used one of the longer included screws to thread the new holes in the plate (not the receiver). This was easily accomplished due to the aluminum construction of the plate. Finally, to mount the plate, I used the shorter screws from to underside of the receiver into the plate - exactly how the rib riser was mounted.

String mount. Great fit. Easy to install. Great value

Junk. All the allen heads stripped under light tightening. And the red dot mount holes stripped. Included wrenches did not fit screws well.

Mounted to a mossberg 500 Turkey gun. Vortex viper red dot mounted as it should and it holds zero even under the recoil of 3 inch magnum loads.

This seems decent quality but I had a issue with actually mounting a 407c to it. Never really found a good screw length, definitely nothing that was in my holosun boxes odd problem so it may just be me

Used to mount a swamp fox/rmr footprint on a mossberg 500 and went right on. Well machined and easy fit.