This is a limited edition model with the aluminum grips and night sights. There's not much information on the web about these so your best bet is to contact Sig direct and provide them with the part number 220C3-45-BSSP-SAO. They can tell you all about the weapon and how many were produced. If I'm not mistaken the number is 75 made. You can verify that when you call. This will make a great collectors gun. I have sent maybe 50 rounds down the barrel. Its been a safe queen and is in mint condition. This item will come with the case, 2 magazines and all factory paperwork. Please email me at or contact me @ (252)947-0503 if you have any questions prior to bidding.