User blog comment:InfinitysCross/I had a question.../@comment-188.61.41.2-20110731201208/@comment-69.144.238.157-20110803055747

Yes, so technically, a weapon still has the near infinite ammo, it's just it would overheat without them. In gameplay, it doesn't have this for obvious reasons, but in canon, it likely happens to sqauds after TC's run out, and also likely overheating takes much longer then in game.