I have seen some other threads mentioning this but I have a question regarding something Sig customer service told me. Mine has #6 rear and # 8 fronts. I am shooting very low. I mentioned this to customer service and they said it comes with #6 rear sights because the short sight radius requires this. Does this make sense? They are saying I can send it in to have it tested but it would cost me the freight plus range time and ammo cost.