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The Defender-ST would be a compatible option with your M18, as the slide is cut to otherwise accept the DeltaPoint Pro footprint, employed by the Defender!
I have a few Vortex optics and Optics Planet always has what I need to finish my firearms the way I like them done.Besides that you just can’t beat the Vortex warranty…
Nice dot, easy to use and holds zero. Battery can only be replaced with dot removal. Elevation and windage locking screws can be block by the firearms rear sight. Can be frustrating
I have a few Vortex optics and Optics Planet always has what I need to finish my firearms the way I like them done.Besides that you just can’t beat the Vortex warranty…
I bought this for a shotgun not a pistol. So the larger moa dot is perfect. Mounting is straight forward and it works well, besides I’m a vortex fan mainly because their customer service is second to none if something does fail.
Product Info for Vortex Viper 1x24mm Reflex Red Dot Sight
These Vortex Viper Red Dot Sights feature bright red 6 MOA reticles for clear targeting in any light levels or background colors. These Red Dot Sights from Vortex Optics have easy to use power and illumination controls on the left side so you can make adjustments without changing your sighting position.Vortex Viper Red Dot Sights mount exceptionally low, so they are a great choice for handguns with cutout slides.
Features of Vortex Viper 1x24mm Reflex Red Dot Sight