Magpul PTS Airsoft Steel "RSA" Rail Sling Attachment
The Magpul Rail Sling Attachment, or "RSA", provides a forward sling attachment point for any clip on style sling. The RSA will easily fit any 20mm or Mil-Spec sized rail. The RSA has also been proven to withstand stress tests of over 300 pounds yet weighs a mere 1.26 ounces.