Luth-AR UR-21K A2 Rear Sight Kit – AR-15, Black

The Luth-AR UR-21K A2 Rear Sight Assembly Kit is a complete A2-style rear sight package designed to mount on an A2 upper receiver. The kit requires assembly and is intended for AR-15 platforms fitted with an A2 upper. The manufacturer provides a schematic for the kit contents; consult that schematic for specific components included. The finish supplied is black.

Key Specifications

• The manufacturer is Luth-AR.
• The model/designation is A2 Rear Sight Kit.
• The part designation shown in provided material is UR-21K.
• This kit fits AR-15 platforms with an A2 upper receiver.
• The finish/color is Black.
• The kit requires assembly prior to installation.
• It is designed to mount on an A2 upper receiver.
• The product is categorized as Long Gun Sights.
• Kit components are provided by the manufacturer; refer to the manufacturer’s schematic for exact contents.

Designed for builders and restorers who need the classic A2 rear sight profile, this assembly kit delivers a straightforward, factory-style sighting solution for A2 upper-equipped AR-15s. Its black finish and AR-15 fit make it a practical choice when completing or repairing a service-style upper where an A2 sight is desired.