ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturers 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 :

• 21-Round Magazine
• Fits The Fn Five-Seven Usg 5.7X28MM
• Magazine Body Constructed of a Proprietary Dupont Zytel Based Polymer
• Injection Molded Magazine Follower
• Magazine Spring Formed From Heat Treated Chrome Silicone Wire
• Made in the U.S.A.