AAC 300 fans would welcome this announcement from Airsoft Taiwan as they are now an exclusive agent for the AAC300 Blackout Front End Kit. Check with your retailer if they are going to be available and this would probably more for M4 GBBs. But if you want a completer AAC 300 Blackout GBB, check this AST Custom GHK M4 with AAC 300, which can be a desired GBB due to its hardkick. More of the AST AAC 300 below: