This is a slightly used Sadlak Airborne M14/M1A Scope Mount. This is the steel, Airborne Model. It features a lightweight skeletonized frame with seven, 3/8" diameter CNC machined lightening holes in the top of the rails for reduced weight without sacrificing strength. It is precision machined from chrome-moly steel bar stock and heat-treated to Rc 50 for superior strength. Mil-Spec Parkerized finish resists abrasion and corrosion. Adopted by the 101st Airborne, this mount comes with the instructions packet.