The Mission First Extreme Duty AR-15 Magazine features a brand new design and utilizes new polymer technology that rivals other brands in durability and performance. The rigid exterior is molded specifically to increase crush and impact resistance while providing plenty of texture for better grip when extracting magazine from the magwell. The long glass fiber polymer also allows the mag to bend under pressure and return to shape without breaking unlike aluminum mags which will bend and stay bent causing malfunctions. The MFT magazine features a USGI-spec stainless steel follower spring that has been properly heat treated to withstand loading and unloading thousands of rounds and the four-way anti-tilt self-lubricating follower ensures rounds are always angled for reliable feeding into the chamber. This MFT 30 round magazine is built for extreme duty.