Mount Rail adapter with QD stud for Bipod attachment or sling swivel attachment. Needs a keyring type ring for slings.Fits onto Weaver type rails and enables the use of bipods or quick release sling swivels where you were previously unable to use them.Fits standard 20mm weaver and picatinny railMaterial:Aluminum/SteelWeight: 2.2 ozColor: BlackWORKS GREAT WITH HARRIS BIPODSAPPX-2" LENGTHBLACK ANODIZED All Steel C1045 Guaranty FitmentEASY TO INSTALL Fit 1913 picatinny and Weaver Rail