Evolution Gun Works HD Picatinny Rail Blank 16in 4140 Carbon Steel. HD Picatinny Rails from Evolution Gun Works delivers a lightweight yet durable material that will last for years to come. Evolution Gun Works HD Picatinny Blanks deliver the same level of quality that you come to expect from EGW mounts. Be sure to see the full line of EGW mounts along with mounts rings & bases from other top brands. Specifications for Evolution Gun Works HD Picatinny Rail Blank: Manufacturer: Evolution Gun Works Color: Black Finish: Matte Gun Rail: Picatinny Height: 0.35 in Condition: New Quantity: 1 Mount Type: Picatinny Attachment Type: Picatinny Features of Evolution Gun Works HD Picatinny Rail Blank: Highly durable material for tactical performance Available in steel or aluminum Package Contents: Evolution Gun Works HD Picatinny Rail Blank Evolution Gun Works 89030: HD Picatinny Rail Blank 4140 Carbon Steel 16inch