Product Description AR-15 A2 REAR SIGHT ASSEMBLY A2 REAR SIGHT ASSEMBLY KIT at Shooting Surplus Browse all Shooting Surplus deals $61.91 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