I just acquired one and did a 5 min install on a 39. Pretty easy, drift old sight out with supplied drift and hammer. Install new one, center it, and secure with allen screw.
Adjust windage and elevation to 21 feet and do final adjust at range. I like it so far, brighter than guide rod laser and equal to CT without making grip fatter. Easy press button activation.
I'll give a report after range session, encouraged so far and have seen mixed reviews on the product. Oh, 95 bucks on Ebay, two day delivery.
Last edited by Shark1007; 08-15-2012 at 22:17..