BGM-71B
It has improved range to 3 750 m. This missile flies faster and has a longer wire. Otherwise, it is similar to the basic BGM-71A.
ITOW (Improved TOW), or BGM-71C
It was adopted by the US Army in 1976. This missile has an improved shape-charged warhead. It also has an extensible probe that triggers the detonation of the warhead and provides optimum detonation distance. The probe is extended after the launch. This missile penetrates 630 mm of steel armor.
TOW 2
is an upgraded version of the TOW. It entered service with the US Army in 1983. This weapon system is composed of a new BGM-71D missile, a new reusable launcher, a missile guidance set, and a sight system. The launcher is lighter. It is compatible with all previous TOW missiles. It has thermal optics and can be used at night. The new missile has a larger warhead (5.9 kg) with the extensible probe, as well as improved guidance. Over 77 000 BGM-71D anti-tank guided missiles were produced.
TOW 2A or BGM-71E
It appeared in 1987. It has a tandem warhead and is intended to defeat tanks with Explosive Reactive Armor (ERA). It penetrates 900 mm of steel armor behind ERA. Newer missiles, starting from the TOW 2A are produced both in wireless and wire-guided forms. The wireless missiles require no special alterations to the launcher. Over 34 000 of the BGM-71E missiles have been delivered. In 2003 these missiles were used by US Marines in Iraq, destroying several Iraqi T-72 tanks.
TOW 2B or BGM-71F
is a top-attack missile. It appeared in 1987. This missile explodes above a tank to penetrate its thin top armor. In concept, it is similar to a Swedish RBS 56 BILL. It has a maximum range of 4 200 m. Its warhead weighs 6.14 kg. This missile lacks an extensible probe. These anti-tank missiles are produced in wireless and wire-guided forms. The first unit was equipped with these missiles in 1992. In 2003 these missiles, alongside the TOW 2As were used by US Marines in Iraq, destroying several Iraqi T-72 tanks. The conflict marked the first operational firing of the TOW 2B missiles. However, during combat in Afghanistan, the TOW 2B was found to be less effective than the older TOW 2A.
TOW 2N
TOW 2N was an improved anti-tank system, that used missile with wireless data link. It appeared in 1989. However this weapon was not adopted by the US military.
BGM-71G
BGM-71G is a top-attack missile with different warhead. It also lacks extensible probe.
BGM-71H
BGM-71H is a bunker-busting missile. It is used against buildings or fortified structures. This missile has a range of 3 750 m. This missile is produced in wireless and wire-guided forms
TOW 2B Aero
an extended-range version with a maximum range of 4.5 km. Previously this weapon was known as TOW 2B (ER). This missile is produced in wireless and wire-guided forms.
Toophan
Toophan is an Iranian reverse-engineered version of the TOW.