Don't believe the inventory availability ("in-stock") verbage on Midwest Tactical's web site.
I ordered a couple of 97B and 75B mags. Both were listed as "in-stock". Weeks later I called, both were back-ordered. I asked "why does the web list them as in-stock?" The answer was amazing, "It's too much work to keep that information up-to-date."
A couple of months pass and they send me 1-97B and back-order the other, I cancelled everything outstanding.
I won't even go into detail the number of phone calls I made to them. If you get an operator every tenth call, you are doing well. And don't bother to leave a message, you won't get a call back.
My advice, shop elsewhere!
John