ProMag RM40 Standard 40rd Detachable w/Roller Follower 5.56x45mm Fits AR-15 Black DuPont Zytel Polymer Choke Tubes 5 mm AUX jack for

5 mm AUX jack for use of MP3 and mobile devices

The cloth works by leaving a microscopic film of the anti-fog compound on the lens which prevents the build-up of condensation

Eight profiles dig gunk out of the places that even the sun don't shine

The premium CPM MagnaCut blade features superior edge retention on both sides of the blade and it opens and retracts with authority

ProMag RM40 Standard 40rd Detachable w/Roller Follower 5.56x45mm Fits AR-15 Black DuPont Zytel Polymer Choke Tubes 5 mm AUX jack forThis replacement or spare magazine is compatible with your AR 15. It is constructed of DuPont Zytel polymer with an anti tilt roller follower and mag spring formed from chrome silicone wire. Made in the USA.