Product Description AR-15 Flip-Up Rear Sight - Back-Up Iron SightMounts onto the AR-15 flast-top receiever, directly onto the Picatinny railAluminum and Steel ConstructionLength: 1.3" (extended) 1.9" (folded)Weight: 3.7 oz Ar15 Flip Up Rear Sight at Everest Browse all Everest deals $21.39 In Stock at Everest Buy Now at Everest Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Everest Everest