Complete A2 rear sight kit, this kit requires assembly and will mount on an A2 upper receiver.

Features

• UR-29 A2 Rear Base Lug (x1)
• UR-27 A2 Rear Sight Aperture (x1)
• UR-28 Rear Base Flat Spring (x1)
• UR-26 Rear Base Windage Knob Screw (x1)
• UR-23 Rear Base Windage Knob (x1)
• UR-22 Rear Base Windage Pin (x1)
• UR-24 Rear Base Spring (x3)
• UR-25 Rear Base Ball Bearing (x3)
• UR-33 Rear Base Index Elevation (8/3) - (x1)
• UR-34 Rear Base Elevation Knob (x1)
• UR-31 Rear Base Elevation Knob Spring (x1)
• UR-06 Rear Base Spring Pin (x1)
• UR-32 Rear Base Index Screw (x1)

Luth-AR UR-21K, A2 Rear Sight Kit, Fits A2 Upper Receivers For AR-15 Firearms, Black.