C-MORE Systems STS2 Super Bright 3 MOA Red Dot Sight, Black Heads Up Display for Fastest Target Acquisition Super Bright 3 MOA Red Dot with 10 Manual Brightness Settings 1 MOA Click Adjustments for Windage and Elevation Featuring a Positive Locking Screw Removable Battery Tray Eliminates Re-Zeroing When Changing Batteries Requires a C-MORE Mounting Kit (Sold Separately)