Package Includes Stud Mount Adapter + Bipod Mounts to Existing Swivel Stud, Provides a 3 Slot Picatinny Rail Section for Rail-Mounted Accessories such as Grips, Bipods, Lasers, Lights etc. Features A Side Swivel Stud To Maintain Continued Use of Shoulder Strap. Easy to Install. Weight - 3oz. Deluxe High Tech Durable Machined Aluminum