With the Strike Industries Multifunction End Plate and Castle Nut, you be won't be limited to just 1 type of sling mount or attachment style. Both pieces are made from steel and offer an antirotation design. The end plate is also reversible and features 3 sling mounting options, a traditional sling loop and a loop for hook-style attachments. StrikeIndustries Strike Industries Multifunction End Plate and Castle Nut - Gun Cases And Racks at Academy Sports