The FGM-148 Javelin System: America's Secret Weapon? The Javelin missile remains one of the United States’ most potent systems on the ground, and one that seems set to increase in capability and be deployed on a greater number of platforms. Here's What You Need To Remember: the Javelin is such an effective weapons system that who gets one is can be a major political issue. The U.S.-made FGM-148 Javelin is one of the premier portable anti-tank missile systems in the world. It’s also an expensive piece of kit, with each missile typically costing more than the targets it eliminates.