Q3015AE4VMA - Bernard BTB 300A MIG Gun, 15ft Cable, Miller Connection (Q3015AE4VMA)

Bernard BTB 300 Amp MIG Gun for Miller Feeders

The Bernard BTB (Best of the Best) MIG Gun platform is the industry standard for heavy-duty industrial welding, combining the most popular features of the legacy Q-Gun, S-Gun, and T-Gun series into one superior product line. The Bernard Q3015AE4VMA is a pre-configured 300 Amp air-cooled MIG gun designed specifically for welders who demand reliability and comfort. With a 15-foot cable, this gun provides excellent reach around large assemblies and fixtures, making it ideal for structural steel, heavy equipment manufacturing, and general fabrication.

This model comes equipped with a Miller-style power pin, ensuring plug-and-play compatibility with a wide range of Miller wire feeders, including the Millermatic series and industrial feeders like the 70 Series. The gun is rated for 300 Amps at 100% duty cycle when using CO2 gas, or 60% duty cycle with mixed gases, providing the thermal capacity needed for sustained welding operations without overheating.

A key feature of this assembly is the Centerfire consumable system. Unlike traditional threaded tips, Centerfire contact tips drop into the gas diffuser and are locked in place by the nozzle. This design improves electrical conductivity and heat transfer, resulting in smoother arcs and longer consumable life. The nozzle's built-in spatter shield also protects the diffuser and ensures consistent gas flow. The gun features a comfortable, ergonomic curved handle and a durable strain relief system that protects the cable from stress at the connection points.

Whether you are replacing an old gun or upgrading your Miller machine for heavier work, the Bernard BTB 300A gun offers the durability and performance professional welders trust.