C-MORE Systems Railway Red Dot Sight with Click Switch Blue 4 MOA
http://www.amazon.com/gp/product/B00D4L5K1Q?tag=sukses2015-20
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 Click Intensity Switch 12 Positions Off 2 NV 1 Low Light and 8 Day light
Attaches to Weaver or Picatinny Rail Mounts