I've read elsewhere that even though they're stated as backorder, they still fill each order generally within a couple of weeks. I put in an order for the 25rd adjustable stock model, and 2 spare magazines about two weeks ago, and I believe they're shipping out as we speak.
They told me that they had 100+ backorders for the rifle, but 500 of them arriving with their next shipment. It's actually crazy that a week later they show backorder again after going to 'instock' on the site for only two days!!
I'll try to let you know when I receive my stuff, but I'm not thinking you'll have to wait long from Cabela's.
You might want to check BadgerArmsSupply.com as he told me that he was expecting in a number of the 25 round mags around this time.
Good luck!