Nikon M-223 Series XR AR Mount 30mm 20 MOA Incline Black Aluminum 840 Developed Specifically For The M-223 Series Of Scopes, This Special Mount Fits Picatinny Rails Found Atop Most Flattop ARs. The M-223 XR (Extended Range) Mount Is constructed Of Lightweight Alloy With a Built-In 20 MOA Incline To Maximize Elevation For Extreme Long Range Shooting. Specifications: Type: Rings/Mount Model: M-223 Series Scopes Style: 30mm Misc: 20 MOA Incline Finish: Black Material: Aluminum Pieces: 1 Gun Type: AR-Style Mount Type: Picatinny Rail Rings Included: Yes Ring Height: High