Thought some here might be interested.
http://militarytimes.com/blogs/gears...r-new-mission/
http://300aacblackout.com/resources/...-infosheet.pdf
new round that uses all standard m4 equipment other than barrel.
According to AAC, Remington is looking to mass produce the ammo to keep cost down for volume shooters.
Here is a video, pretty quiet...
http://www.youtube.com/watch?v=VivPz-Z0wAw