Aim Sports low profile 45 degree angled front & rear sight for use with standard AR-15. It is constructed of anodized aluminum with a ball bearing pivot detent, and mounts to standard Mil-Spec 1913 Picatinny rail. The flip-up standard A2-style front and A2-style dual aperture rear sights automatically locks into position when raised to the shooting position. This model has a black finish and is compatible with 0.49 MOA on A4 type rifles and 0.65 MOA/M4 carbine.