The Leapers UTG Low Profile Dual Aiming Rear Sight is precision built from aircraft grade aluminum for superior durability. The spring-loaded Posi-lock design with side plunger release allows for easy flipping and folding of the sight. Equipped with a dual aiming aperture, this sight boosts accuracy during normal shooting and is ideal for moving target engagements as well as limited visibility shooting environments.Easily installed on a picatinny rail equipped AR platform, the Leapers UTG Flip-Up Dual Aiming Sight guarantees zero retention with a Posi-lock plunger coupled with spring activated ball bearings.