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 Fn 509 9MM Pistol
Magazine Body Constructed of Heat Treated Steel with Black Oxide Finish
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.