Heckler & Koch HK416/SA80/AR15/M4 30rd Steel Maritime Magazine
The Factory New/Original Heckler and Koch HK416/SA80/AR15/M16/M4 30rd Steel Maritime Magazine is designed for high reliability use and has been combat-proven by US special operations forces and foreign military units.
I hear these use the same paint as the Mk23, so y'all can flex on the poors from your yachts without worrying about rust.