I presently am rigged up with a viper quick set 2500c and am not that impressed with it. I realy like a one pin slider sights vs multi pin (personel prefrence). I am looking at the HHA 5519 and the sportsman special. I am familiar with the HHA and its a great sights by all accounts. I hav'nt had a chance to realy look the Sure Loc over. Does anyone have any experience with the Sure Loc and what do you think.