ProMag Industries

ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer's defects. Magazine springs are precision wound using heat-treated chrome silicon wire and each and every step of the assembly process is checked and double checked in order to maintain the same consistent level of quality. Features : - 30-round Magazine - Fits AR-15 5.56mm Rifles - Magazine Body Constructed of a Proprietary DuPont Zytel Based Polymer - Patented Anti-tilt Roller Follower - Magazine Spring Formed from Heat Treated Chrome Silicon Wire - Made in USA