Spend more - Viridian Weapon Technologies RFX Custom Walther PDP WMP

Thought this would be perfect on my Walther WMP, but not so. none of the plates that came with the the pistol will fit this sight. the Veridian does come with it's own plates that fit the WMP,however it is too high to cowitness the pistol sights, , the battery located underneath is not a big problem,however it is not sealed to environment, and no sealing gasket was supplied with the dot sight. Also, when torquing the dot screws to Veridians specs of 8-10 inch pounds, the base of the dot sight warps up exposing the underside to the environment.Another problem that I discovered is that since this dot sight is auto brightness,in daylight it is too bright, and at night in total darkness, the dot completely disappears. I will never buy another auto brightness control dot sight again!