Tier One Sling Stud Adapter US Tactical/ELR/ATAC Bipods Only Black. Bipod sold separately. Specifications for Tier One Sling Stud Adapter: Manufacturer: Tier One Color: Black Fabric/Material: Aluminum Features of Tier One Sling Stud Adapter Standalone Bipod adapter for Tactical Bipod ATAC Bipod & ELR Bipod - Sling Stud adapter for mounting over your rifle's existing sling stud via a pin and screw mechanism. Bipod sold separately. Package Contents: Tier One Sling Stud Adapter Nil Tier One T1BSTUDADUS: Sling Stud Adapter US Tactical/ELR/ATAC Bipods Only Black