The Aim Sports MT45FS is a low profile 45-degree angled front & rear sight designed for use with standard AR-15 rifles. Made from anodized aluminum, it features a ball bearing pivot detent for premium functionality. This model is easy to install, attaching directly to the standard Mil-Spec 1913 Picatinny rail.When raised to the shooting position, the flip-up standard A2-style front and A2-style dual aperture rear sights automatically lock into place, ensuring accuracy and convenience. The MT45FS comes in a sleek black finish. It\'s compatible with 0.49 MOA on A4 type rifles and offers 0.65 MOA/M4 carbine compatibility as well.