ProMag magazines are designed utilizing both traditional stamping and welding of heat-treated high carbon steel" and modern precision injection molding of mil-spec polymer compounds. Every ProMag magazine is backed by a lifetime guarantee against manufacturer's defects. Made in USA
50-Round Drum 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.
Stock Notice: This item is NOT marked "In Stock". We will contact you within 12-24 hours by email if your order is on backorder with our distributor and will take longer than the 5-7 business days it takes us to ship out. Please do not order if you need this item shipped immediately.