Miller MDX 100 MIG Gun

New ergonomic handle improves grip and reduces welder fatigue. Long-life Consumables Miller AccuLock MDX Series consumables available on all MDX-100 Guns. Compatibility. This gun is compatible with the Millermatic 141 and 211 as well as the Multimatic 215 and 220 AC/DC. Duty Cycle is 100% with CO2 and 60% with mixed gas.