Tweco / Lincoln style Mig Gun. Our Tweco Minimig, Tweco #1, #2 ,#3, #4 & #5 style replacement Mig Guns interchange with original equipment welding guns and use Standard, Non Patented consumables, replacement parts and accessories for Tweco and Lincoln Magnum style Mig welding guns. Our Mig welding guns are made in the USA and meet or exceed OEM standards and specifications. Ready to weld includes: contact tip, nozzle and liner. Direct connection to wire feeders is available.