I bought this same Item at a local CC Military Surplus. I equipped it to my Tippmann A-5 with the LAPCO Offset Sight Rail and Mount. It works like a dream. The 5 illuminating settings work great for anywhere from night games (with the green dot sight) to day games (with the red dot sight), and even in the fog. It also takes minimal time to adjust the sight accuracy (granted you have the open area).