Almost every Boeing air-frame can be converted from civilian to military use. That is part of the reason that they are still in the military aircraft business,. Lets lay out the three air framers in the US, we already talked about Boeing. Lockheed is the fighter house along with some transport (C-130 which isn't being produced now). Northrup Grumman is the bomber supplier along with drones, that is not to say they have a lock on the market, both Boeing and Lockheed have a foot in the door, maybe not as much. You can say that Boeing builds the F-18, but in reality, that was awarded prior to Boeing purchasing McDonnell-Douglas. Yes he does.... Look above. The fact of the matter is that any civilian aircraft can be upgraded for military use, the converse isn't usually true.