The Tac-Six Rail Mount Swivel Stud is made from a durable and lightweight aluminum. The Rail Mount system allows you add a sling to any Picatinny rail style rifle that does not have hardware installed. Includes the necessary hardware to install swivels onto Picatinny and Weaver rails. Installs in minutes, and can be used with Allen's Magnum Swivel Sets. Product Features: Durable and Lightweight Aluminum Sling to any Picatinny Rail Style Includes the Necessary Hardware to Install Swivels Installs in Minutes Can be Used with Allen's Magnum Swivel Sets