Viridian 9810126 RFX Custom Black Walther PDP/WMP 3 MOA Red Dot
http://www.tandktactical.com/shop/785034179709-viridian-9810126-rfx-custom-black-walther-pdp-wmp-3-moa-red-dot-42756
http://www.tandktactical.com/web/image/product.template/42756/image_1920?unique=94960a0
3 MOA Red Dot for Walther Arms PDP/WMP. IPX4 waterproof. INSTNAT-ON with Ambient Light Sensor.