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MK Products MIG Guns

Explore premium MK Products MIG guns at WeldingMart, including the Python® and Prince® XL series. Designed for smooth wire feeding and precision, these push-pull MIG guns are perfect for aluminum and industrial welding applications.

MK Products MIG Gun Collection — Push-Pull Precision for Professional Welders

When you need a MIG gun that handles aluminum wire without bird-nesting, feeds consistently from 15 ft to 50 ft, and holds up through a full production shift, the answer is almost always a push-pull design from MK Products. WeldingMart stocks one of the widest selections of MK Products MIG guns available online — Prince XL, Python, Python LX, Cobra MX, Cobra SX, and the newer X-Series digital guns — all at competitive prices with same-day shipping on orders placed before 3 PM CT. Free freight on orders $99 and up. Whether you're building a boat, fabricating aircraft panels, or running automated aluminum production, you'll find the right MK Products MIG gun in our collection.

MK Products invented push-pull wire feed technology and continues to refine it. Their guns are built in the USA and are trusted in aerospace, marine, automotive, and heavy fabrication shops worldwide. Every product in this collection pairs with the Cobramatic® Pro Series wire feed system or the newer CobraMig® 300 digital feeder, and direct plug-in connectors make them compatible with Lincoln, Miller, Fronius, and MK power sources — no adapter headaches.

Top MK Products MIG Guns in Our Collection

MK Products Prince XL Push Pull Gun — The Industry Standard Pistol Grip

The MK Products Prince XL is the flagship pistol-grip push-pull gun in the Cobra Welding lineup. Rated at 255 amps (duty cycle 60%), the Prince XL push pull delivers smooth, consistent wire feed at speeds up to 900 ipm — fast enough for high-deposition aluminum production work. The MK Products Prince XL is available in air cooled and water cooled configurations, and in cable lengths of 15 ft, 25 ft, 35 ft, and 50 ft. MK Products Prince XL push pull guns come with connectors that are compatible with MK, Lincoln, Miller, and Fronius power sources right out of the box.

The products Prince XL push pull design uses a #2 AWG power cable and a poly-lined conduit that glides aluminum wire with minimal friction. Wire capacity runs from .030" to .045" solid and hard wire and .030" to 1/16" aluminum and flux-cored wire. If you weld aluminum regularly, this is the products Prince XL push pull platform to start with. The MK Products Prince XL gives you the ergonomics of a pistol grip combined with the reliable drive motor that defines every products Prince XL push pull gun in the Cobra system.

Air cooled models are available in 15 ft and 25 ft lengths as standard configurations; 35 ft and 50 ft are available for extended-reach work. Water cooled versions of the MK products Prince XL handle higher duty cycles and are ideal for shops running continuous beads on thick aluminum plate. Add an MK products Prince XL to your cart to configure cable length and connector type at checkout.

MK Products Python® — Advanced Gooseneck Push Pull Welding Gun

The Python® is MK Products' most popular gooseneck push-pull gun. It maintains a constant, steady, uniform wire feed speed regardless of how the cable is looped or draped — a critical advantage in real-world shop environments where the gun cable rarely stays perfectly straight. The Python is rated at 225 amps air cooled and 450 amps water cooled, making it versatile enough for light fabrication and heavy aluminum production alike.

Python push pull welding guns are compatible with MK, Lincoln, Miller, and Fronius wire feeders through direct plug-in connectors. Cable length options are 15 ft, 25 ft, 35 ft, and 50 ft for both air cooled and water cooled models. The knurled drive roll and grooved idler roll handle wire diameters from .030" to 1/16" for aluminum and .030" to .045" for steel and stainless, giving you one platform for multiple materials. The Python is a top-selling push pull mig product for shops transitioning from conventional spool-gun setups to a full push-pull system with a remote wire feed cabinet.

Python models are stocked in both Lincoln-compatible (7-pin) and Miller-compatible (10-pin) configurations. Fronius-compatible (9-pin) models are also available. A 15 ft air cooled Lincoln-compatible Python ships as a compact, lightweight package ideal for out-of-position work; the 25 ft Miller-compatible version gives you reach for larger fixtures and table-side welding. The 50 ft water cooled model is the go-to for robotic workcells and long-reach automated applications.

MK Products Python LX — Optimized for Lincoln and Miller Digital Feeders

The Python LX is a refined variant of the Python, optimized for compatibility with modern Lincoln and Miller digital wire feed systems. It uses the same proven gooseneck design and push-pull motor technology but includes updated connectivity that matches the 10-pin and 7-pin interfaces on current-generation machines. Available in 15 ft and 25 ft air cooled configurations, the Python LX is an excellent choice for shops running newer digital welding power sources. Add a Python LX product to your cart and ship same day from Appleton, WI.

MK Products Cobra MX — Heavy-Duty Gooseneck Push Pull MIG

The Cobra MX is MK Products' heaviest-duty gooseneck push-pull gun. It is available in Classic, MAX, and HD variants as well as air cooled and water cooled configurations. The water cooled Cobra MX handles demanding continuous-operation applications — 400 amps or higher — making it the right choice for shipyards, pressure vessel fabrication, and aerospace production lines where the gun is running almost continuously. Cable lengths of 15 ft, 25 ft, 35 ft, and 50 ft are available to suit your workstation layout. The Cobra MX is compatible with Miller and other major power source brands through 10-pin or 14-pin direct connections.

MK Products Cobra SX — The Lightest Gooseneck in the Lineup

At less than 1 lb 12 oz total head weight and under 1¼" nominal grip diameter, the Cobra SX is the smallest, lightest gooseneck push-pull gun MK Products makes. Air cooled only (keeping cable weight to a minimum), it feeds aluminum, stainless, and other hard wire materials with the same reliability as its larger siblings. The Cobra SX is air cooled through design — there's no need for water cooling at its amperage range. Its rear trigger location and left/right-handed speed control dial make it comfortable for welders of any preference. Available in 15 ft, 25 ft, 35 ft, and 50 ft lengths, compatible with Lincoln, Miller, and Fronius.

MK Products X-Series Digital Push Pull Guns — Python X, Prince X, Cobra X

The X-Series digital guns pair exclusively with the CobraMig® 300 Power Supply and Feeder. The Python X, Prince X, and Cobra X all use a 14-pin connector and deliver precise digital speed control directly at the gun. All X-Series models are available in air cooled configurations in 15 ft, 25 ft, 35 ft, and 50 ft lengths. If your shop is investing in new digital infrastructure, the X-Series guns are the forward-compatible choice.

Air Cooled vs. Water Cooled MK Products MIG Guns — How to Choose

Choosing between an air cooled and water cooled MK Products MIG gun comes down to three factors: amperage, duty cycle, and wire type.

  • Air cooled models are lighter, simpler, and require no coolant system. They are rated at 225 amps (60% duty cycle) and are well-suited for job shop work, out-of-position welding, and applications where the gun is not running continuously. Most aluminum fabrication shops run air cooled guns without issue. Air cooled guns in 15 ft and 25 ft lengths are the most common configurations on the shelf.
  • Water cooled models handle 400 amps and beyond and are designed for continuous-operation production environments. They run cooler, extend consumable life, and are standard equipment in automated welding cells and high-volume fabrication. Water cooled guns require a separate coolant recirculator. Available in 25 ft, 35 ft, and 50 ft cable lengths.

For most aluminum MIG welding applications — marine fabrication, transportation equipment, light structural — an air cooled Prince XL or Python at 15 ft or 25 ft is the right starting point. Move to water cooled when your duty cycle exceeds 60% or when you're welding plate thicker than 3/8".

Frequently Asked Questions

What is an MK Products MIG gun and how does push-pull work?
An MK Products MIG gun is a push-pull welding torch with a built-in drive motor in the gun head. The wire feeder cabinet contains a second (slave) motor that runs at slightly higher speed to keep wire tension positive from cabinet to arc. This dual-motor push-pull welding system prevents the wire buckling and bird-nesting that occurs when soft aluminum wire is pushed through long cable runs with a single motor. The result is consistent arc starts, stable wire feed speed, and dramatically better aluminum weld quality compared to standard single-drive MIG setups.
Which MK Products MIG gun is best for aluminum welding?
The Prince XL push pull and Python push pull are both excellent for aluminum welding. The Prince XL suits operators who prefer a pistol grip; the Python is the choice for gooseneck handling or work in confined spaces. Both are compatible with Lincoln, Miller, and Fronius power sources. For production aluminum welding at high duty cycles, step up to a water cooled Python or Cobra MX. All aluminum-compatible models use a poly-lined conduit that minimizes friction on soft aluminum wire.
What cable lengths are available for MK Products push-pull guns?
MK Products MIG guns are available in 15 ft, 25 ft, 35 ft, and 50 ft cable lengths across most models. The 15 ft and 25 ft lengths are most common for bench and fixture welding. The 35 ft and 50 ft lengths are used when the wire feed cabinet must be positioned away from the weld area — large fixtures, ship sections, or semi-automated cells. WeldingMart stocks multiple lengths and can ship the same day for orders placed before 3 PM CT.
Are MK Products MIG guns compatible with Miller welding machines?
Yes. MK Products produces Miller-compatible guns with a direct 10-pin plug-in connector that interfaces with Miller wire feeders without adapters. Python Miller-compatible, Prince XL Miller-compatible, and Cobra MX Miller-compatible models are all stocked at WeldingMart. Miller welding power sources paired with MK Products push-pull guns are one of the most common combinations in professional aluminum shops.
What is the difference between air cooled and water cooled MK Products guns?
Air cooled MK Products MIG guns are rated at 225 amps at 60% duty cycle and require no coolant system. They are lighter and simpler, making them ideal for job shops, out-of-position work, and applications where welding is not continuous. Water cooled guns handle 400 amps or more and are designed for high-duty-cycle production environments. They run cooler, last longer in continuous service, and extend consumable life — but require a coolant recirculator. Most aluminum fabrication shops run air cooled guns at 15 ft or 25 ft cable lengths without issue.
Can I use an MK Products MIG gun with a Lincoln Electric welder?
Yes. MK Products produces Lincoln-compatible guns with 7-pin connectors that plug directly into Lincoln CV power sources and engine-driven welders. Python Lincoln-compatible and Prince XL Lincoln-compatible models are available in air cooled and water cooled versions, in 15 ft, 25 ft, 35 ft, and 50 ft lengths. Lincoln and MK Products is a standard pairing in aerospace and marine aluminum fabrication.
Where can I find replacement parts for MK Products MIG guns?
WeldingMart stocks replacement parts for MK Products MIG guns including liners, contact tips, nozzles, diffusers, drive rolls, and trigger assemblies. Use your gun's model number (e.g., 291-825 for a Python Miller-compatible 25 ft air cooled) to identify the correct replacement parts. The Cobra SX uses original Cobra® consumables for backward compatibility. Same-day shipping applies to replacement parts orders placed before 3 PM CT.
What is the Prince XL push pull gun's amperage rating?
The MK Products Prince XL push pull gun is rated at 255 amps at 60% duty cycle for the standard configuration. Wire feed speed reaches up to 900 ipm maximum. The Prince XL handles wire sizes from .030" to .045" solid and hard wire and .030" to 1/16" aluminum and cored wire on a 4-inch spool. These ratings are measured at 25V using argon shielding gas; actual performance varies by wire size and input voltage.
Do MK Products MIG guns work with Fronius welding machines?
Yes. MK Products produces Fronius-compatible guns with 9-pin connectors for direct connection to Fronius CMT and pulse MIG power sources. Python Fronius-compatible models are stocked at WeldingMart in 15 ft and 50 ft air cooled configurations. If you run Fronius equipment and need a push-pull gun for aluminum work, MK Products is the proven choice.
What is the Cobra SX and when should I choose it over the Python or Prince XL?
The Cobra SX is the lightest, most compact gooseneck push-pull gun in the MK Products lineup — under 1 lb 12 oz head weight and less than 1¼" handle grip diameter. Choose the Cobra SX when access to tight joints is a priority, when welder fatigue from a heavier gun is a concern, or when you need a lightweight air cooled gun for extended-duration out-of-position work. It feeds aluminum, stainless, and hard wire and uses original Cobra® consumables for easy parts sourcing. Available in 15 ft, 25 ft, 35 ft, and 50 ft lengths, compatible with Lincoln, Miller, and Fronius.