K3421-4 - Lincoln Magnum PRO AL G225A Push-Pull Gun, 50ft, 7-Pin

Reliable Aluminum Feeding with Lincoln Magnum PRO AL G225A

The Lincoln Electric Magnum PRO AL G225A (K3421-4) is a premier air-cooled push-pull welding gun designed specifically to tackle the challenges of aluminum MIG welding. Aluminum wire is soft and prone to bird-nesting or erratic feeding when pushed through standard long cables. The G225A solves this by incorporating a powerful motor in the handle that pulls the wire while the feeder pushes it, ensuring smooth, consistent delivery over the impressive 50-foot (15.2 m) cable length.

This model features a 7-pin connector and a front trigger configuration, making it compatible with select Lincoln Electric power sources and wire feeders. It is rated for 225 amps at a 60% duty cycle, making it ideal for general fabrication, automotive repair, and trailer manufacturing where mobility around large workpieces is essential. The 50-foot reach allows welders to move freely around large structures without moving the power source.

One of the standout benefits of this gun is the integration of Magnum PRO consumables. These consumables, including Copper Plus contact tips, are designed to withstand higher heat and last longer than standard tips, reducing the frequency of tip changes and increasing overall productivity. The gun also features a quick-change liner system and a tool-less drive roll cover, simplifying maintenance on the shop floor.

Key Features for the Professional Welder

• Extended Reach: 50-foot cable allows access to large weldments without relocating equipment.


• Superior Feeding: Push-pull technology eliminates friction issues common with soft aluminum wires.


• Ergonomic Design: Lightweight handle and balanced weight distribution reduce wrist strain during long shifts.


• Durable Consumables: Uses Magnum PRO front-end parts for extended service life.