XS Sight Systems Xpress Threat Interdiction Sight AR-15 Green w/White Outline AR-15 Angle Mount Sights-Standard Tritium Front w/ White Stripe Rear. Perfect with magnified optics. XTI Please Note Please check your state regulations hunting regulations etc before placing an order with this supplier. Your order may be canceled if the item is not able to be shipped to your state due to their regulations.