This is a Holosun Technologies Red Dot known as the 515CM, model HE515CM-GR.
Since Holosun's inception in 2013" their main goal has been to bring cutting edge technology to the end user. Holosun continuously strives to improve and innovate by producing technology that makes sense and works!
Features:
Picatinny Mount
Non-Magnified
Multi Reticle System