I ran my Gen1 sub 2k in a two gun shoot, realized the front sight is lacking, (umm, maybe my aging eyes might have something to do with it). I saw the fiber optic sights on Performance Services site, wondering if anyone had experience with the sights, red or green. I hadn't shot the gun in a while, forgot how much fun it is to shoot, especially in competition. I had a lot of 'fans', no one asked where my AR was!