Lincoln MAGNUM Pro Curve 300 MIG Welding Gun

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Lincoln MAGNUM® Pro Curve™ 300 MIG Welding Gun

Semiautomatic Air-Cooled Guns

Magnum® PRO Curve™ guns for MIG or flux-cored welding combine our classic curved handle with our Copper Plus® contact tips and Magnum® PRO gun expendables to deliver long hours of fabrication welding with less frequent tip and gun expendable parts changes.

  • Industrial Grade Construction
  • Lincoln Electric Copper Plus® Contact Tips - Larger tip diameter and mass improve heat dissipation to increase tip life.
  • Curve™ Handle Design - Our Curve™ handle is lightweight and balanced, providing a comfortable grip to reduce fatigue.
  • Rotating Gun Tube and Gun Hanger Clip - Allow any number of hand positions to reduce fatigue or fit into tight spaces.
  • Simplified Expendable Parts Selection

Download Torch Catalogue


  • MIG, Pulsed MIG, Flux-Cored
  • Wire Diameter Range
  • .025-3/64 in. (0.6-1.2 mm)

Available Configurations

Please note some torches do not include machine connector or liner.

 Torch Length Machine Connector Liner Size Part Number
10 ft.  NONE NONE K2951-1
15 ft.  K466-6 - PowerMIG and Wave 300C 0.035-0.045" K2951-2-6-45
15 ft.  NONE NONE K2951-2
15 ft.  K466-10* - See Below 0.035-0.045" K2951-2-10-45
25 ft.  NONE NONE K2951-4

K466-10 Connector Compatibility

  • LF-72™, LF-74™ Series
  • Flex Feed® 74 HT, Flex Feed 84
  • LN-25 PRO™, LN-25X®
  • Activ8®, Activ8X®
  • Power Feed® 10, 10M, 25M, and 84 PIPEFAB™

What's Included?

  • Contact Tip (Qty. 1) (KP2744-045)
  • 0.625 in. (15.9 mm) Thread-On Gas Nozzle with 1/8 in. (3.2 mm) recess (KP2742-1-62R)
  • Thread-On Diffuser (KP2746-1)
  • Gun Liner (KP44-3545-15)