The MagPul RSA QD, Rail Sling Attachment provides a forward attachment point for a sling equipped with push-button Quick Detach swivels. Designed to mount on a standard 1913 picatinny rail, the RSA is angled to place the attachment point in a convenient and comfortable position for extended sling use. Having the sling swivel near the top of the gun also makes it easy to access the push button release if the weapon needs to be put down in a hurry. Steel construction and Melonite finish ensures function and durability in the harshest environments.