Enhancing the durability, compactness and usefulness of an AR's rear sight was the goal with the Mission First Tactical AR-15 Flip-Up Rear Sight, and the company's design offers all of these qualities in spades. The Mission First Tactical AR-15 Flip-Up Rear Sight features a body that's molded using a combat-proven polyamide polymer and provides a dual-aperture design for quick close-range target acquisition and long-range precision accuracy. Mounts to all standard Picatinny rails Flat blade required for MOA adjustments To protect the peep sights from damage, the Mission First Tactical AR-15 Flip-Up Rear Sight uses a heavy-duty shroud that protects the Mfg: Mission First Tactical