Luth-AR A2 Rear Sight Base Stripped Black

Luth-AR A2 Rear Base Stripped Black. For Mil-Spec A2 upper receiver only. Specifications for Luth-AR A2 Rear Base Stripped: Manufacturer: Luth-AR Gun Make: AR Platform Gun Model: AR-15 Sight Position: Rear Front Sight Color: REAR SIGHT ONLY Rear Sight Color: Black Country of Origin: USA Gun Type: Rifle Color: Black Package Contents: Luth-AR A2 Rear Base Stripped What firearm models does the manufacturer say Luth-AR A2 Rear Base Stripped is compatible with? The manufacturer suggests that Luth-AR A2 Rear Base Stripped is compatible with AR-15Luth-AR UR-29A: A2 Rear Base Stripped Black