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MK Products Welding Supplies & Equipment

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MK Products Welding Supplies & Equipment

MK Products has been the welding professional's choice for high-performance push-pull MIG guns, wire feeders, and welding consumables since the company was founded in the 1960s. Based in Irvine, California, MK Products built its reputation in the aerospace and defense industries — sectors where aluminum welding quality, precision wire feeding, and gun reliability are not negotiable. The Cobramatic push-pull wire feeder system, MK Products' signature innovation, solved one of the most persistent challenges in MIG welding: reliably feeding soft aluminum wire through long torch cables without bird-nesting or inconsistent wire delivery. That engineering DNA carries through every product in the MK lineup today.

At WeldingMart, we carry the full MK Products catalog as an authorized dealer — MIG guns, push-pull systems, wire feeders, barrels, collets, contact tips, liners, tungsten electrodes, and turntable positioners. With 1,884 MK Products SKUs in stock, we're your one-stop source for MK equipment and replacement parts, backed by our 50+ years of welding supply expertise.

MK Products Product Categories

  • Cobramatic Push-Pull MIG Systems — The Cobramatic is the industry benchmark for aluminum MIG welding. The push-pull system uses a motor-driven gun head synchronized with the feeder drive to maintain positive wire tension over long cable distances — critical for soft 4043 and 5356 aluminum wire that conventional push-only systems cannot feed reliably. Used in aerospace assembly, marine fabrication, automotive production, and structural aluminum welding. Available in air-cooled and water-cooled configurations. Shop MK Products MIG Guns
  • MIG Guns & Torches — MK Products manufactures both standard push MIG guns and specialized push-pull guns in amperage ratings from 150A to 600A. All guns feature high-quality consumable interfaces and are engineered for high-duty-cycle industrial applications. MK guns are used on Lincoln Electric, Miller, ESAB, and other major brand wire feeders. Browse MK MIG Guns
  • Wire Feeders — Standalone and boom-mounted wire feeders designed to pair with the Cobramatic system or operate independently. MK wire feeders are built for demanding production environments with robust drive systems and precise wire speed control. Shop MK Wire Feeders
  • MIG Gun Barrels & Liners — Replacement barrels and liners for MK Products guns. Available in steel and Teflon-lined configurations for different wire types. Barrels come in multiple lengths and neck angles to suit different weld positions and access requirements. Browse MK Barrels
  • Contact Tips & Collets — A comprehensive range of contact tips in standard and heavy-duty grades for all MK gun platforms. Available in copper, silver-plated copper, and chrome-zirconium copper for extended tip life in high-production applications. MK collets and collet bodies for precise wire guidance are among the most precise in the industry. Shop MK Collets
  • Tungsten Electrodes — Premium tungsten electrodes for TIG welding in pure tungsten (green), ceriated (grey/gold), lanthanated (gold/black), and thoriated (red) grades. Available in standard and non-standard diameters to suit precision TIG applications. Shop MK Tungsten
  • Welding Positioners & Turntables — Compact and heavy-duty welding turntable positioners for rotating workpieces during welding, improving access, consistency, and weld quality. MK turntables are engineered for precision rotation with minimal runout. Shop MK Turntables
  • Consumables & Spare Parts — Full range of MK Products replacement consumables including nozzles, gas diffusers, tip adapters, drive rolls, and cable assemblies. Genuine OEM parts ensure compatibility and performance. Shop MK Consumables

Cross-shop related process hubs: MIG Welders (GMAW/FCAW) | TIG Welders | MIG Welder Accessories | TIG Consumables

Why Choose MK Products

MK Products occupies a specialized niche in the welding industry: high-performance guns and feeders for applications where standard push-only equipment simply does not perform. Here's what separates MK from commodity MIG gun manufacturers:

  • Aerospace Heritage: MK Products' founding customers were aerospace manufacturers welding aluminum aircraft components where consistent wire delivery and bead quality are mission-critical. The Cobramatic system was engineered specifically to solve the wire-feeding problems that plagued early aluminum MIG welding. That aerospace-grade engineering standard is embedded in every MK product.
  • Push-Pull Mastery: MK Products is the most recognized name in push-pull MIG gun technology. Competitors offer push-pull systems, but the Cobramatic remains the reference standard that others are compared against in aluminum welding performance evaluations. The synchronized motor control and precision drive system deliver wire at consistent speeds regardless of cable length or position.
  • Aluminum Welding Specialization: While MK Products guns work with all wire types, they were designed with aluminum in mind. The gun interior geometry, liner materials, and drive roller configurations are optimized to feed soft aluminum wire without deformation, kinking, or inconsistent delivery — the root causes of porosity and inconsistent penetration in aluminum MIG welds.
  • Production-Grade Durability: MK Products guns are built for industrial duty cycles, not occasional use. Components are specified for tens of thousands of arc-on hours before requiring service. The robust construction translates directly to lower total cost of ownership in production environments.
  • Consumable Availability: MK Products maintains complete consumable and spare part availability for current and legacy gun models. Unlike some specialty gun manufacturers, MK Products consumables are actively stocked and readily available — critical for production shops that cannot tolerate downtime from out-of-stock replacement tips or liners.
  • Compatibility: MK Products guns and wire feeders are designed to interface with most major welder brands. Whether your power source is Lincoln Electric, a legacy industrial machine, or a specialized automated welding system, MK Products offers configurations to fit your setup.

Best-Selling MK Products at WeldingMart

These MK Products items are top picks for WeldingMart customers working in production MIG, aluminum welding, and TIG applications:

  • Cobramatic Push-Pull MIG Gun Systems — Available in multiple amperage ratings and cable lengths. The definitive solution for aluminum MIG welding with long cable runs, remote wire feeders, or difficult-access weld positions.
  • MK Products Contact Tips (HD) — 3/8" x .053" ID Short Arc 25pc Package — Heavy-duty contact tips for high-production MIG welding. Chrome-zirconium copper construction for extended life versus standard copper tips.
  • MK Products Barrel Liners (.030–1/16" wire range) — Replacement Teflon-lined barrels for smooth wire feeding with aluminum and other soft wires. Available in green (.030–1/16") and white (.030–.035") configurations.
  • MK Products Threaded Wire Conduit (25 ft) — Flexible conduit for routing wire from feeder to gun head in push-pull systems. Threaded end fittings for secure connection.
  • MK Products 10" Welding Positioner/Turntable Kit — Compact 10-inch tilting/rotating positioner for small to medium assemblies. Ideal for weld shops, small fabricators, and skilled trade programs.
  • MK Products Collets & Collet Bodies — Precision collets for consistent wire guidance through the gun neck. Available across the full range of wire diameters MK guns support.
  • MK Products Tungsten Electrodes — Premium TIG tungsten in ceriated and lanthanated grades, preferred by production TIG welders for longer electrode life and easier arc starting versus pure tungsten.

MK Products Certifications & Technical Standards

  • AWS D1.2 Compliance: MK Products welding equipment is used in structural aluminum welding applications certified under AWS D1.2 (Structural Welding Code — Aluminum), where consistent wire delivery is a prerequisite for qualified weld procedures.
  • AWS A5.10 Filler Metal Compatibility: MK Products guns and feeders are designed and tested to feed AWS A5.10 aluminum filler wires (4043, 5356, 5183, 4047, etc.) reliably, including the soft, small-diameter wires that push-only guns cannot handle.
  • MIL-SPEC Applications: MK Products equipment has been used in U.S. military and defense aerospace programs, where welding equipment must meet or exceed MIL-SPEC performance and reliability requirements.
  • UL/CSA Listed Components: Electrical components within MK Products wire feeders and gun systems carry UL and CSA listings as applicable for safe use in North American industrial environments.
  • ISO 9001 Quality System: MK Products manufacturing operations are conducted under quality management systems aligned with ISO 9001 standards for process control, traceability, and continuous improvement.

Frequently Asked Questions — MK Products

What is the MK Products Cobramatic system?

The Cobramatic is MK Products' push-pull MIG gun and wire feeder system specifically engineered for aluminum MIG welding. In a standard push-only MIG setup, the feeder motor pushes wire through the cable to the gun. With soft aluminum wire and cable lengths over 10–12 feet, this results in wire buckling, bird-nesting, and inconsistent wire delivery. The Cobramatic solves this by adding a synchronized pull motor in the gun head that works in tandem with the feeder push motor, maintaining positive, consistent wire tension through the entire cable length — enabling reliable aluminum MIG welding at cable lengths up to 25 feet or more.

What wire diameters do MK Products guns support?

MK Products guns support aluminum and steel wire from .030" to 1/16" diameter, with specific barrel liner and drive roller configurations for each wire size. The most common aluminum wire diameters — .030", .035", 3/64", and 3/32" — are all well-supported by the Cobramatic system. Contact WeldingMart with your specific wire diameter and alloy to confirm the correct MK Products configuration for your application.

Are MK Products guns compatible with Lincoln Electric wire feeders?

Yes. MK Products guns are designed to interface with Lincoln Electric wire feeders as well as other major brand feeders. Compatibility depends on the specific gun model and feeder — the gun-to-feeder connection type (Euro, Lincoln, or proprietary), the control cable interface, and the amperage rating of the gun relative to the welder output. WeldingMart's technical team can confirm compatibility for your specific Lincoln Electric welder and feeder model.

How do I choose between an air-cooled and water-cooled MK Products gun?

Air-cooled MK Products guns are suitable for duty cycles up to approximately 60% at rated amperage and are simpler to operate without a water cooling system. Water-cooled guns are required for 100% duty cycle production welding at high amperages (300A+), as the water cooling system removes heat from the gun neck and handle that would otherwise cause premature wear and operator discomfort. For continuous production aluminum MIG welding, water-cooled Cobramatic systems are the standard specification.

What is the correct liner for welding aluminum with MK Products guns?

MK Products recommends Teflon-lined (PTFE) barrel liners for aluminum wire. Steel wire liners have a rough surface that can shave aluminum wire and create debris that causes feeding problems and contamination. MK Products Teflon-lined barrels (green for .030"–1/16" wire, white for .030"–.035" wire) provide the smooth, low-friction surface that soft aluminum wire requires. Always use Teflon liners when welding aluminum — never steel liners.

What industries use MK Products Cobramatic systems?

The Cobramatic system is used across a wide range of industries that require high-quality aluminum MIG welding: aerospace and defense (aircraft structures, missile components), marine and shipbuilding (aluminum hull fabrication), automotive and motorsports (aluminum chassis and body components), rail (aluminum passenger car bodies), construction (structural aluminum), oil and gas (aluminum vessel fabrication), and general manufacturing. Anywhere that consistent aluminum wire feeding over long cable distances is required, the Cobramatic is the preferred solution.

How do I order MK Products replacement parts from WeldingMart?

WeldingMart stocks a comprehensive inventory of MK Products OEM replacement parts — contact tips, collets, liners, barrels, nozzles, drive rolls, and cable assemblies. Use the search bar above with your MK Products part number or gun model number to locate the correct replacement parts. If you need help identifying the right part, contact WeldingMart's technical support team with your MK Products gun model and the part description.

Can MK Products guns be used for steel and stainless steel MIG welding?

Yes. While MK Products guns are most famous for aluminum push-pull applications, they perform equally well with steel, stainless steel, and other wire types in push-only or push-pull configurations. For steel welding, use steel wire liners (not Teflon) and the appropriate contact tip size for your wire diameter. MK Products' high build quality and precise wire feeding make their guns an excellent choice for any critical MIG welding application, not just aluminum.

Shop MK Products at WeldingMart or explore process hubs: MIG Welders | TIG Welders | MIG Welder Accessories | TIG Consumables | TIG Welding Supplies

Pair MK Products guns and accessories with the right consumables: Welding Wire & Consumables for GMAW and FCAW processes, and Stick Welding Electrodes & Rods for SMAW rigs. Browse the complete All Welding Machines & Supplies catalog for full machine and accessory pairings.

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MK Products Welding Supplies & Equipment Questions & Answers