Purpose built to last, a "buy once and use for life" mentality, so you can use this mount for generations to come. Continental Liberty Stainless Steel MLOK QD Sling Mount is made using old German casting and metal working techniques, the mount is engineered and built like a Panzer to absorb and deflect hard impacts. Made of grade 410 stainless steel for a lifetime of hard use in harsh environments. Each piece is inspected and polished to maximize smooth edges to reduce snagging on gear. Stainless steel surface further hardened by nitriding, a process used in hardening the inside of barrels. Nitriding provides a matte black finish. Super short mlok screws for tight tolerances. Made for all mil-spec QD sling swivels. 4 slot, anti rotation to prevent swivels from spinning.