The Magpul RSA sling mount provides a forward sling attachment point for the Magpul MS2/MS3 and other clip-in systems such as the HK hook. The Magpul RSA sling attachment is made from precision cast steel which is then black manganese phosphatized. The Magpul RSA attaches to any MIL-STD-1913 Picatinny or STANAG 4694 rail. Light yet quite strong, the RSA has been tested to withstand over 300 pounds of force yet weighs a mere 1.26 ounces. Features * All cast steel construction * Mil-spec black manganese phosphate finish * Works on any standard 1913 Picatinny-spec rail Made in U.S.A.