Hi cmdwelding!
I would call Miller Electric customer service to find out more about the wire feeder and, to answer your question about availability of an adapter for the gun your looking to use or, ask the gun manufacturer whether or not they have the appropriate adapter for that particular wire feeder... I apologize for not typing in Miller's telephone number but, I'm sure you could find it on their website...
Question: Is'nt there a welding distributor that you've dealt with recently available to find the answers to your questions?
If they cannot, then consider seeking the help of another welding distributor other than your supplier because, that's what they're supposed to do for their customers... No Offense my friend!
Respectfully,
SSBN727
Run Silent... Run Deep!!!