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. Stocking 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: Most in-stock items ship within one business day from our US warehouse.
- Full consumables supply: We stock the complete Magnum PRO 250L consumables line so you can source tips, nozzles, and liners in one order.
Questions about compatibility or application? Browse the full Magnum PRO Guns collection or reach out to our welding experts directly.