DBoys Airsoft M4 CQB QD Sling Swivel Plate for M4 Rear Stock
Constructed out of solid metal, the DBoys rear stock sling swivel plate allows M4 owners convenience in installing a rear sling swivel. Simply remove the rear stock bar, install this plate by sliding it into place between the receiver and the rear stock assembly, and in minutes your rifle will have a fully functional rear sling swivel plate.