Product Description Luth-AR, A2 Rear Sight Kit, Fits A2 Upper Receivers For AR-15 Firarms, Black LUTH AR A2 REAR SIGHT ASSEMBLY/KIT at Shooting Surplus Browse all Shooting Surplus deals $67.67 In Stock at Shooting Surplus Price verified 1d ago Buy Now at Shooting Surplus Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Luth-Ar MPN UR-21K Gun Parts Luth-Ar