Precision Reflex PRi Rail Mounted Flip Up Front Sight Black. This is a same-plane aperture system so it works on any weapon where the forearm rail is at the same level as the receiver. This front sight has a side detent button that locks it into place and allows you to flip it up and fold it down at will. As for the aperture system the front circle housing prevents shadows from obstructing your aim and the full-circle hood gives you a wide field of view to acquire and change targets quickly. At a weight of only 0.3 ounces this front sight is minimalist and secure so pick one up today Specifications for Precision Reflex PRi Rail Mounted Flip Up Front Sights: Manufacturer: Precision Reflex Rear Aperture Size: 0.07 - 0.2 in Sight Mounting Orientation: Top Mounted Sight Position: Front Gun Model: AR-15 Gun Make: AR Platform Front Sight Color: Black Rear Sight Color: Front Sight Only Deployable: Yes Fabric/Material: T6 6061 Aluminum Front Blade Height: 1.4 in Illumination Type: Non-Illuminated Gun Type: Rifle Included Accessories: Standard Weather Resistance: Yes Features of Precision Reflex PRi Rail Mounted Flip-Up Front Sights: Same-Plane Aperture System Locking Detent for Security Machined From T6 6061 Aluminum Low-Profile Design Package Contents: Precision Reflex PRi Rail Mounted Flip Up Front Sights What firearm models does the manufacturer say Precision Reflex PRi Rail Mounted Flip Up Front Sights is compatible with? The manufacturer says that Precision Reflex PRi Rail Mounted Flip Up Front Sights is compatible with AR-15Precision Reflex 05-0028: PRi Rail Mounted Flip Up Front Sight Black