We have added upgrade options to the complete upper. See the site

These are 4140 chrome moly barrels chambered 5.56 and 1x9 twist - 5.56 chambered chrome moly barrel with M4 profile made by a leading OEM manufacturer, Bulldog .
Bulldog has requested that you not contact them with questions about their barrels, they are not setup to handle retail calls on such a large scale but requested we field all the calls and your questions to our toll free # 866-833-7177 . 
  

We received them in the white and have had them duracoated in matte black. 

They look very good and the quality of the barrel itself is excellent.
Flat top upper, standard handguards, single rail gas block and A2 flash hider.
These uppers are assembled and test fired.
$235+shipping
You will need a bolt/carrier assembly and charging handle to make them ready to run.
Order will need to be place thru our website so there is a time stamp on it.
Orders will be processed in the order received.
Due to the overwhelming success of sales on this upper expect 3-5 day lead time for shipment.
Thank you for your patience.