ID this Tweco mig gun

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This is the Mig gun off my Airco C-300 mig welder. The switch stuck and I needed a new one. I don't know what Tweco model number this gun is, but was able to ID the switch by picture. The switch number is 350R-90. I would like to know what model this gun is so I can order a spare liner for it. It takes 22-50 nozzles and 14t-35 contact tips. It is on my Aircomatic Mighty II wire feeder. Also, is there a way to adapt a Miller gun to this feeder? Attached Images
Reply:I would hazard a guess it uses a regular old Tweco liner that all the bigger guns use.Disclaimer; "I am just an a$$hole welder, don't take it personally ."
Reply:Looks like a Mini Mig to me.If so it would take a 35-40-15 liner and can be set up for either 14 or 11 series consumables.
Reply:Originally Posted by vwguy3Looks like a Mini Mig to me.If so it would take a 35-40-15 liner and can be set up for either 14 or 11 series consumables.
Reply:You're taking all the fun out of it.You're supposed to walk in and say "I need a part for my welder" then the counter guy asks "what machine" and you say "I'dunno....it's blue?"