MBUS AR15 / M16 Sights
These newly manufactured MBUS (Magpul ® Back-Up Sights) sights feature adjustable elevation & color injection molding. They will fit most 1913 Picatinny railed handguards, but specifically designed for use on AR15 & M16 rifles. Made by Magpul in the U.S.A.
This part is found in the following schematics