I just purchased the HHA Optima Lite and am very pleased so far. It can slide up for different yardages but my Defender shoots pretty flat out to 30 yards. Only about an inch high at 20. I looked at it and the Cobra single pin sites and felt that it was a more rugged design. No plastic on this one. These 2 had the brightest pin out of all the sites I looked at. I shot the Trophy Ridge Matrix with 5 pins last year and feel a single pin is easier to pick up.