Magpul Industries RSA QD Rail Sling Attachment. These Gun Accessories from Magpul Industries are made from corrosion resistant steel and are compatible with Picatinny rails. Magpul Industries MAG337 QD Rail Sling Attachments are easy to install sturdy and stay firmly attached until you actively detach them. Get superior fit and finish with Magpul Industries Quick-Detach Rail Sling Mounts. Specifications for Magpul Industries RSA QD Rail Sling Attachment: Manufacturer: Magpul Industries Color: Black Fabric/Material: Corrosion resistant steel Condition: New Gun Model: M16 M4 AR-15 Features of Magpul Industries RSA QD Rail Sling Attachment 55-SV-MAG337: Compatible with 1913 Picatinny rails. Low profile unobtrusive design. Provides a forward sling attachment point for the MS4 and other QD swivel sling systems. Package Contents: Magpul Industries RSA QD Rail Sling Attachment 55-SV-MAG337 What firearm models does the manufacturer say Magpul Industries RSA QD Rail Sling Attachment is compatible with? The manufacturer suggests that Magpul Industries RSA QD Rail Sling Attachment is compatible with AR-15 M4 M16Magpul Industries MAG337: RSA QD Rail Sling Attachment