Magpul RSA - Rail Sling Attachment | Mars Gear | Mars Gear
Amazon.com: EZshoot Picatinny Sling Mount 2PCS, 360° Rotation Picatinny Rail Sling Attachment, Sling Swivel with QD Picatinny Rail Mount and Push Button for 2 Point Sling, Low Profile Rail Sling Mount :
East County Guns
Picatinny QD Sling Mount - Gen 2 Tactical Link Sling Mount