TOW (Tube-launched, Optically Tracked, Wire-guided) is the preferred anti-armor weapon system for U.S., NATO, and Coalition forces worldwide produced by Raytheon. It provides devastating effectiveness against the most modern and heavily protected armored vehicles and fortifications. Aerojet Rocketdyne manufactures the warheads for two variants of the missile. TOW 2A is equipped with a tandem warhead. A small disrupter charge detonates the reactive armor and allows the main shaped charge to penetrate the main armor. TOW 2B operates in a 'flyover shoot down' top attack mode with two tantalum explosively formed penetrator (EFP) warheads.