Pro Mag Industries AR-15 Magazine Features The ProMag AR-15 Magazine is purpose built for rifles chambered in .350 Legend holding 10 rounds in a steel body that is heat treated for strength and finished in black oxide to resist corrosion. That heat treating process hardens the magazine body against the wear and flexing that repeated loading and unloading can cause helping the magazine maintain its feed lips and overall shape over years of use. The black oxide finish adds a layer of protection against rust and surface wear which matters for a magazine that may spend time in a hunting pack or range bag exposed to moisture. ProMag s injection molded follower is engineered to ride smoothly within the magazine body reducing the chance of feed hesitation as rounds are stripped into the chamber. Inside a magazine spring formed from heat treated chrome silicone wire is used to maintain consistent reliable spring pressure across the full capacity of the magazine. That spring material is chosen specifically because it resists the fatigue that can creep into lesser magazine springs after repeated cycles of loading and firing. Manufactured in the USA this ProMag magazine gives .350 Legend AR-15 shooters a dependable option for topping off at the range or in the field during hunting season. This ProMag AR-15 Magazine in .350 Legend is available for sale at GrabAGun for shooters who want a durable American made spare magazine for their rifle. Pro Mag Industries AR-15 Magazine Specifications Manufacturer: Pro Mag Industries Model: AR-15 Magazine Caliber: .350 Legend Capacity: 10 Rounds Material: Steel Finish: Black Oxide Compatible Hosts: AR-15/M-16 Available At: GrabAGun