DD Rail Mount Quick Detach Swivel Attachment Point, Fits Picatinny Rail, Black Finish 03-021-30029 Available to order on-line. Ships in 5-14 days $54.40
DD Rear Receiver QD Attachment Point W/Swivel, Fits AR Rifles, Black Finish 03-018-30026 Out of stock. Check back later... $66.30