Precision Reflex .308 Flat Top Rail Riser w/20 MOA 9 in Anodized Aluminum Black. This aluminum mount with full Picatinny rail will extend the mounting platform area to the front or rear. This mount is constructed of T6 6061 hard coated black anodized aluminum. Raises the 1913 rail up .450 from the receiver. The overall length of the riser is 9in. And weighs 5.44 ounces. Specifications for Precision Reflex .308 Flat Top Rail Riser w/20 MOA: Manufacturer: Precision Reflex Color: Black Finish: Hard Coat Anodized Fabric/Material: T6 6061 Aluminum Quantity: 1 Gun Make: AR Platform Gun Model: AR-10 Length: 9 in Width: 1.35 in Weight: 5.44 oz Condition: New Gun Rail: Picatinny Package Contents: Precision Reflex .308 Flat Top Rail Riser w/20 MOA Precision Reflex 03-072-10B: .308 Flat Top Rail Riser w/20 MOA 9 in Anodized Aluminum Black