Gary from United States, ID Public Profile

I have a Meprolight M21 on one of my flattops. I wanted to add a 3x magnifier, so I purchased the MMX3 (brand consistency). It's a nice unit, but it has some quirks that are a bit annoying. First, with the M21 mounted as far forward on the pic rail as it will go, the flattop is one slot too short to mount the MMX3. This is because the magnifier is mounted too far forward on the QD mount (design issue). So, I installed 1/2" tall an extended riser to obtain enough slots to pair these unit on the flattop. But wait, the MMX3 mount won't attach to a 1/2" tall riser because of the depth of the mount below the top of the pic rail. I ended up using a 3/4" riser to get it to clear. I tried a Holosun magnifier that I use on a different flattop, and it fit perfectly behind the M21 mounted when directly to the flattop (no riser or extension). Meprolight, you got some work to do.

Nice sight for the money. The choice of reticles is nice. Had to do a little filing on the base plate to make it fit the slide on my Glock clone. Auto-brightness is nice, works well in daylight, but doesn't go dim enough for night work unless using weapon mounted light (had to manually adjust for that). My biggest complaint is the sight base. Because of the mounting plate, the sight sits high enough that it blocks my suppressor height night sights. With the open emitter sight I was using, I could see the iron sights thru the optic. Not with this one. I might move this sight to a PDW.