No idea on details...
I have no idea if they are truly in stock as I did not not order them. I have used these guys in the past and I have nothing bad to say about them. In comparison, they do list all their other hi-capacity as out of stock, so they may actually have them in hand.
I have plenty of mags around, just thougt I would share the link as I know there are a lot of people looking for hi-capacity mags at the moment...
"The philosophy of gun control: Teenagers are roaring through town at 90MPH, where the speed limit is 25. Your solution is to lower the speed limit to 20."
- Sam Cohen (inventor of the neutron bomb)