Over the past year or so I’ve become a huge fan of the 300 AAC Blackout round. So much so that I built my own 300 AAC Blackout rifle during this past year and its probably my favorite rifle I own. There are so many positive aspects that have been well discussed on AR15NEWS.com but just as a refresher, 300 AAC Blackout only uses a different barrel and flash hider. Everything is still the same as a 5.56 upper including the BCG, Mags, Lower, etc. Well, if you are looking for a super high quality 300 AAC Blackout complete upper to add to your collection, I’ve found the one for you. This is about as nice of a 300 Blackout upper as you can get and includes a full Advanced Armament Corporation (AAC) 300 Blackout Upper, Full BCG with NiB Bolt Carrier, AAC 51T Blackout Flash Hider and a Knight’s Armament Company (KAC) 10.75″ URX II Rail with integral Front Flip-up Sight. At $999.95 this is obviously not a cheap upper by any means but its got some pretty awesome components that give it that type of price tag. Check out the pic below. This complete upper can be purchased at AIMSuplus.com.