Precision Reflex PRi Delta Rail Mounted Flip Up Front Iron Sight Black. From the base to the post is 1.208in and weighs 1.9 ounces. The sight is designed to lift up and lock in the up position but requires the pivot pin to be pushed to lower. Specifications for Precision Reflex PRi Delta Flip Up Front Iron Sights: Manufacturer: Precision Reflex Color: Black Condition: New Sight Mounting Orientation: Top Mounted Sight Position: Front Gun Model: Armalite AR-10 Gun Make: Armalite Front Sight Color: Black Rear Sight Color: Front Sight Only Deployable: Yes Fabric/Material: Aluminum Gun Type: Rifle Included Accessories: Standard Mount Type: Rail Package Contents: Precision Reflex PRi Delta Flip Up Front Iron Sights What firearm models does the manufacturer say Precision Reflex PRi Delta Flip Up Front Iron Sights is compatible with? The manufacturer says that Precision Reflex PRi Delta Flip Up Front Iron Sights is compatible with Armalite AR-10Precision Reflex 05-B028: PRi Delta Rail Mounted Flip Up Front Iron Sight Black