Ade Advanced Optics Delta RD3-012 Red Dot Reflex Sight + Optics Mount Plate for SW Smith Wesson MP/MP 2.0 Pistol and also a standard Picatinny mount

From Everest

*Comes with a removable standard Picatinny mount and pistol mount (replace rear sight) fits certain SW models like Smith & Wesson M&P Full Size, M&P 2.0 Full Size, M&P 22 Full Size, M&P Compact, M&P 2.0 Compact, SD9VE, SD40VE, M&P Shield*The included gun mount for SW is not compatible with Smith & Wesson M&P CORE Series (already optic ready), M&P Shield EZ .380, M&P .22 Compact, SW9VE, SW40VE, SW40, SW9, Sigma, 1911*1.75 L x 1.25 W x 1.15 H. Shockproof, fogproof, and waterproof for 30 minutes under 4-foot water.