Weaver/Picatinny Type Rail Mount with Sling Swivel Stud/ Bipod Adapter Provides Sling Swivel Stud as a mounting point for Slings or Bipods that mount to Swivel Studs, like NcSTAR Precission Grade Bipods Mounts to most Weaver/ Picatinny MIL-STD 1913 type rails Low Profile Design Black Anodized Aluminum Construction.