Axcel armortech hd. Fully enclosed fiber optics, great adjustments, rock solid. Its spendy but it will be the last sight you will ever buy. 
i agree this sight is badd ass. we just bought two of them and it is the funk. my wife went from being a ok shot to becoming a a good-great shot. great sight great customer service if you have a problem just call them and they will send you a new part and get you shooting fast give them a shot , also they are tough as nails
