Daniel Defense Fixed Front and Rear Sight Combo Black - 19-088-09116.pThis can also be used for airsoft as well.pRail-mount fixed front sight is lightweight and easy to install on any MIL- STD-1913 rail and secures with a slotted fastener threaded into a self-locking stainless steel thread insert. One piece streamline design. A1.5 fixed rear sight features a one piece streamline design, A1 sight adjustment, A2 aperture and slotted screws attachment. Aircraft grade 6061-T6 aluminum. Military specification type III hard coat anodized. Made in the USA.