TacFire 45 Degree Offset Low Profile Polymer Flip-Up Front & Rear Sights TacFire official product, 45 degree Offset low profile Polymer flip-up sights Picatinny/Weaver with dual Aperture/flat dark earth Spring loaded with flip-up Posi-lock design to guarantee zero Front sight A2 post with elevation adjustment Rear sight with dual Aperture with windage adjustment designed for close QUARTER Battle