Flip-up reserve sights employ unique diamond shape that gives specific reference points to help your eye instantly center the target in the sights. Clamps to securely Picatinny rail, with a locking system that ensures sights stay up securely and remain zeroed. When not in use, sights fold down with the push of a button Front sight has angled ears protect the A2-type post and serve as visual reference point. Rear sight offers dual same-plane short and long-range apertures, horizontal white reference marks, and A 1/2 MOA windage adjustments. Folds and deploys with either aperture active. Mfg: Diamondhead Usa SPECS: Machined 6061 T6 aluminum, Type III hardcoat anodized, matte black finish. Fits Picatinny rail. Front Sight - 1.1" (2.9cm) long deployed. 2.3" (5.9cm) long folded. 1.3" (3.4cm) wide. 1.9" (5cm) high deployed. .66" (1.6cm) high folded. Rear Sight - 1.1" (2.9cm)