Give your modern AR-15 / M16A1 that retro look and feel with the Luth-AR A1 Rear Sight Assembly. Features and Specifications: Manufacturer Number: UR-21A Material: Steel Finish: Matte Black Kit Includes: UR-09-E3 Rear Sight Windage Drum UR-10-E3 Rear Base Spring Pin UR-13-E3 Rear Sight Aperture A1 UR-11-E3 Rear Sight Detent UR-12-E3 Detent Spring UR-14-E3 Rear Sight Windage Screw UR-28 Rear Sight Flat Spring
