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

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

Includes:

• A2 Rear Base Lug
• A2 Rear Sight Aperture
• Rear Base Flat Spring
• Rear Base Windage Knob Screw
• Rear Base Windage Knob
• Rear Base Spring Pin
• Rear Base Spring
• Rear BaseBall Bearing
• Rear Base Index Elevation (8/3)
• Rear Base Elevation Knob
• Rear Base Elevation Knob Spring
• Rear Base Spring Pin
• Rear Base Index Screw