TacFire Tactical Low Profile Flip Up Rear Iron Sight With Picatinny Mount TacFire official product, tactical low profile flip up iron sight rear Picatinny/Weaver mount Ball bearing pivot detent, flip-up Posi-lock design to guarantee zero Rear sight with dual Aperture windage adjustment Designed for close QUARTER Battle Made of durable and lightweight T6 6061 aircraft grade aluminum