I do not know the current status of AAC muzzle devices in general, but I have heard that they are back in production. I went on AAC's website and it seems like the do have many muzzle devices in stock.
I cannot, however, find any information on current production of the old MITER devices. I do not have a can or anything yet, but I like the look of the MITER and may be looking to pick up one more unit in 1/2x28 thread.
A year or two ago, I recall these being relatively available for around $100 on gun broker, but they seem to be totally dried up now. Does anyone know if AAC has plans to reintroduce new production MITER devices?