This is IOR's version of the ACOG. It has their CQB reticle and it is illuminated. BDC knobs,but not calibrated.Very sweet piece of glass. I will accept trades for a Mark 4 Leupold 3.5-10x40 Ill. LR/T or an MR/T 3-9x36 Ill. It is in excellent condition with all paperwork and box. $450 shipped(very good price). Add 3% for PP.