This contract win could actually be a loser for General Dynamics shareholders.When you think of General Dynamics (GD -0.12%), what's the first thing that comes to mind?Tanks, probably. Seventy-ton armored behemoths roaming across the plains. In fact, though, while tanks are the product that General Dynamics is best known for, production of such "combat systems" is General Dynamics' smallest business, accounting for only $8.3 billion of the more than $42 billion in sales GD makes in a year. Larger by far is ...