Ohh crap BBill I didn't see the thread and started a new one, sorry. I saw the same thing
Surefire Magazine AR-15 223 Remington 60-Round Aluminum Matte - MidwayUSA
New Shooting Times has an article on a new SureFire High Capacity mag for M16/AR-15. Quad stack configuration. 60 rnd and 100 rnd. Not supposed to ship until March. Article doesn't say if Military gets theirs first. They should. 60 for $129. 100 for $179.