I ordered some of these magazines for my AR: http://www.rangerjoes.com/Magazine-30rd-AR15-Aluminum-P4845C389.aspx I received a notification a few days later stating that they are back-ordered and that I can call to cancel my order if I don't want to wait. The description doesn't explicitly state that they are USGI mags so I thought I'd pose the question here. Does anybody know if these are actually USGI mags? If they are, I'll probably leave my order and wait for them to come back in stock. If not, I'll probably cancel it. I have used USGI mags in my previous AR and current AR and have never had any issues whatsoever with them so I'm planning to stick with them. Given how difficult ammo is to come by these days, I really don't want to start with a new type of magazine as I'd want to fire a few hundred rounds through them before I really trusted them.