The challenger is sure-loc's lower end target sight. Nothing wrong with it though. Sure loc makes OK stuff. Not sure how they put a PSE sight bar on it or what they mean by this. Anyhow, I really prefer the copper john ANTS evo 2 over the sure locs, but either will get the job done. How much is he asking for this setup? I wouldn't pay more than $100 total for it.............