Product Description Complete A2 rear sight kit. This kit requires assembly and will mount on an A2 upper receiver. See listing and schematic below for kit contents. LUTH-AR UR-21K A2 REAR SIGHT ASSEMBLY/KIT at TLO Outdoors Browse all TLO Outdoors deals $86.98 In Stock at TLO Outdoors Price verified 1d ago Buy Now at TLO Outdoors Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Luth-Ar Luth-Ar