I ordered a Contender carbine barrel from MGM in early March. At that time, their web page said to expect 4 to 6 weeks for delivery. Long story short, after a bit of nudging in the form of a couple of emails that I sent them, I had my barrel in hand in early September. It was however, worth the wait. It is very well made, and quite accurate. Good luck.
Yes, I like their barrels. I have six. That includes a barrel screwed onto a bolt gun.
What I have learned over the years is patience. Whether an order is coming from the US or Europe, don't expect it tomorrow.