Springfield Prodigy optic plate. Product rear sight does not match stock sight, it is way lower than stock. Nothing on the web page about this. Emailed Freedom Gorilla, took a while to respond but it was the holidays. Finally got a response that said most people buy a new front sight to match. Again not mentioned on the web sight that I saw. Filled out the appropriate things they sent me online to start a return and ordered a plate directly from Springfield. Still have not received my return authorization which they said they would send via email, but I got this review request via email instead wanting me to review the product that I am trying to return. Long time online shopper and this is the first review I have ever left. Hopefully this will help someone in the future from buying this product. I feel customer service has also been lacking.