Yes, they do have some lead free mil spec solder available. Military/Defense/Aerospace industries are beginning to transition very slowly, but it's proving to be very difficult. In real harsh environments, Sea/Cold/Weather etc. lead free is total garbage. But even under normal conditions, the connection deteriorates and fails much quicker. This is mostly due to tin imperfections in the joint which grow with time. There's no good solution yet, but that's not to say that there won't be soon.
Regarding the glare. Lead will not give you a glaring sound. Glare can be due to poor soldering skills (like cold solder joint where you have impedance problems), or just plain low quality solder. For electronics, good solder should melt at not too high of a temperature and flow beautifully. When set, it should have a shinny joint. Soldering paste should ALWAYS be applied to the metal surfaces. Rosin core solder is not a substitute for this.