PRO RM40SL MAG AR15 5.56MM ROLLER 40R STLLND

ProMag RM40SL Standard 40rd 5.56x45mm NATO For AR-15 Black DuPont Zytel Polymer
Magazine is compatible with your AR-15. It is constructed of DuPont Zytel polymer with anti-tilt mag follower and mag spring formed from chrome silicone wire.