did you post this on TFL under a different name?
Here's what I posted over there for the same question.
I'm a newb here, as well as to shotguns. I just purchased a 500 last week that came with that same stock. I can tell you that there is no way to get down on the sights because the stock is to high (don't know what they were thinking).
When I asked the duck hunter at the local store how to properly fit a shotgun, he told me that when sighting, you shouldn't see any of the barrel, just the bead over the reciever. Can't happen with the ATI stock as it sits too high.
I've taken my gun to the range twice now for a total of about 45 rounds and not had any problem with shooting it. I just throw it up and squeeze the trigger. It shoots where I want it to at 10 yards, and that's good enough for me. I don't know what it's called (pistol would be point shooting I guess), but I never did anticipate using the sights.