This is a new Lincoln K497-2 Magnum MIG Gun & 10’ Cable Assembly.  Here are the specs:

Top Features

Small, lightweight gun intended for light job shop and fabrication applications. Best suited for welding on thin materials using .025-.030 in. (0.6-0.8 mm) wire.

One-piece modular trigger assembly - Molded out of high heat resistant material to withstand head and spatter and ensure long life.

Gun tube design - Armored with an electrically insulated metal jacket optimizing fine wire welding performance.

Abrasion-resistant, extruded rubber jacket - Adds strength and long life to the cable.

Classic curved handle - Lightweight and balanced, providing a comfortable grip to reduce fatigue.

Wire Diameter Range

.025-.045 in. (0.6-1.2 mm)