Viridian 9810127 MDS25 Black Anodized 1 x 29 mm 3 MOA Green Dot
http://www.tandktactical.com/shop/785034179792-viridian-9810127-mds25-black-anodized-1-x-29-mm-3-moa-green-dot-40570
http://www.tandktactical.com/web/image/product.template/40570/image_1920?unique=dd950b8
MSD25 Modern Dot Sight. 3 MOA Green Dot. IPX6 waterproof.