Well, I bought this scope on a whim. When I got it I realized it wasn't what I was looking for. I just like my single turn scopes too much I guess. This scope has never been mounted and was only pulled out of the box twice- when I first got it and to take pictures to sell it. This model does not have the ERGO knob or illumination. Both can be added by USO for a fee. Features: GAP mil reticle, 10x fixed power, 37mm objective, 30mm tube, anti reflective device (honeycomb), sunshade, and flip up covers marked with USO logo. $1,350.