K471-6 - Lincoln Magnum 400 MIG Gun, 400A, 15 ft, 1/16-5/64 in

Built for the Grind: Lincoln Magnum 400

When the heat is on and the amperage is up, you need a gun that can take the punishment. The Lincoln Electric Magnum 400 Welding Gun (K471-6) is a legendary workhorse in the welding industry, favored for its "classic" feel and rugged dependability. This 15-foot air-cooled gun is designed to handle 400 amps at a 60% duty cycle, giving you the power you need for thick plate and heavy structural welding. It comes ready to run large diameter wires (1/16" - 5/64"), making it perfect for high-deposition flux-cored or spray transfer MIG applications.

Comfort That Lasts All Shift

Welding at 400 amps generates significant heat, but the Magnum 400 keeps you welding comfortably. The gun features a longer gooseneck and a specialized handle design that distances the operator's hand from the arc heat. The iconic curved handle fits naturally in the hand, providing excellent balance and control while minimizing wrist strain. A rugged strain relief system at both the gun and feeder ends prevents kinking and protects the liner, ensuring smooth wire feeding even when the cable is bent or twisted around obstacles.

Maintenance Made Easy

Downtime is the enemy of productivity. The Magnum 400 is designed with modularity in mind. The trigger assembly is a single piece that can be easily replaced if damaged, and the expendable parts—contact tips, nozzles, and diffusers—are standard Lincoln Magnum components available everywhere. The gun utilizes a rotatable tube design, allowing you to position the nozzle exactly where you need it. Whether you are welding heavy machinery, structural beams, or performing maintenance in the field, the K471-6 delivers the consistent arc and durability professional welders trust.