C-MORE Systems Serendipity Red Dot Sight with Standard Switch (Frame Width: .830-Inch) Heads Up Display for Fastest Target Acquisition Super Bright Red Dot with Adjustable Intensity and Interchangeable Dot Module Infinite Adjustment for Windage and Elevation Featuring Positive Locking Screws Polymer Body, Standard Intensity Switch (Dial Rheostat) Integral Mount for Standard STI and Infinity (SV), Frame Width = .830"