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 :

• 40-Round Magazine
• Fits AR-308 / .308 Cal AR Type Rifles Using Lr-308 (Dpms) Or Sr-25 Pattern Magazines
• Magazine Body Constructed of a Proprietary Dupont Zytel Based Polymer
• Injection Molded Magazine Follower
• Magazine Spring Formed From Heat Treated Chrome Silicon Wire
• Does Not Fit Rifles Using Armalite Pattern Magazines
• Made in the U.S.A.