Surefire 60rd & 100rd AR-15 Magazines

Ok, so first off, these don't hit markets until March/April time frame. That being said, its still a pretty sweet idea. I watched some of the videos online and if these things are really as reliable as they appear to demonstrate, it may be well worth the painful price tag ($130 for the 60rd and $180 for the 100rd, although I imagine that will go down if the initial release is successful).