The Lincoln Magnum PRO 250L Welding Gun (K4530-2) is a 250-amp, air-cooled MIG gun with a 15 ft cable, engineered for medium-duty job shop and production welding. Running at 100% duty cycle on mixed gas, it handles wire diameters from 0.025 to 0.045 in. and plugs directly into Lincoln POWER MIG series welders.
| Model | Magnum PRO 250L |
|---|---|
| Part Number | K4530-2 |
| Amperage Rating | 250A (100% duty cycle, mixed gas) |
| Cable Length | 15 ft (4.6 m) |
| Cooling Method | Air-cooled |
| Wire Diameter Range | 0.025–0.045 in. (0.6–1.2 mm) |
| Connector / Pin Configuration | Lincoln Twist-Mate compatible |
| Consumables Family | K2950 / Magnum PRO 250L series (KP2954 nozzles, KP2952 tips, KP2955 liners) |
| Welding Processes | MIG (GMAW), Pulsed MIG, Flux-Cored (FCAW) |
| Gun Tube | Chrome-plated for spatter resistance |
The Magnum PRO 250L is the workhorse of the PRO L-series, sized for demanding medium-duty environments where a 100A gun runs out of headroom but a 500A water-cooled gun is more than required.
- Job shop fabrication — structural tacks, bracket welding, and multi-pass fillet welds on mild steel from 14 gauge through 3/8 in.
- Production lines — consistent 100% duty cycle performance means no forced cool-down pauses during repetitive cycles.
- Auto body and light structural repair — the lightweight curved handle and 15 ft reach let technicians work around panels and frames without repositioning the welder.
- Flux-cored self-shielded and gas-shielded work — handles FCAW wire up to 0.045 in. for outdoor or all-position applications.
- POWER MIG 256 and 260 users — direct OEM replacement gun for these Lincoln machines, plug-and-play with no adapter needed.
The Magnum PRO 250L uses the Magnum PRO 250L consumables family. These parts are designed around the large-mass Copper Plus contact tip geometry that keeps tips cooler and uses Anti-Seize threads to prevent seizing in the diffuser. Managing a standard assortment is straightforward because all tips, nozzles, and liners share the same mounting system across the 250L gun family.
- Contact Tips: Magnum PRO Copper Plus tips — available in 0.030, 0.035, and 0.045 in. diameters. The KP2954 series covers standard and extended-life options.
- Nozzles: Thread-on nozzles in flush, recessed, and extended configurations — KP2955 series for 250L.
- Gas Diffusers: Replaceable diffuser body compatible with the 250L gun tube system.
- Liners: Available in 0.025–0.035 in. and 0.035–0.045 in. ranges to match wire size.
- Gun Tube: Chrome-plated replacement gun tube assembly available separately.
Browse our full selection of compatible tips, nozzles, and liners at WeldingMart Torch Tips & Nozzles. Need the full gun accessories hub? Visit the Magnum PRO Guns & Torches collection.
WeldingMart is an authorized Lincoln Electric distributor, which means every Lincoln product we ship — including the Magnum PRO 250L K4530-2 — is 100% genuine OEM equipment backed by Lincoln's full manufacturer warranty. You won't find gray-market or counterfeit product here.
- Genuine OEM parts: Authorized distributor status means factory-direct pricing on authentic Lincoln equipment.
- Expert support: Our team includes experienced welders who can answer application and compatibility questions before you buy.
- Fast US shipping: Shipping times vary; contact us for current estimates.
- Full consumables supply: Our Magnum PRO 250L consumables line includes tips, nozzles, and liners; contact us to confirm availability.
Questions about compatibility or application? Browse the full Magnum PRO Guns collection or reach out to our welding experts directly.