I got my upper and barrel in for my .308 carbine today. Now all I need is the BCG, dust cover, forward assist, charging handle, and the gas tube and block.
http://i70.photobucket.com/albums/i1...T/e163e1f2.jpg
And so you can see the size difference from a regular AR15.
http://i70.photobucket.com/albums/i1...T/00d6721a.jpg
Man this thing seems HUGE after messing with regular ARs for so long. lol