AT4

The AT4 is an one-shot missile launcher designed to destroy armoured cars and fortifications. Designed by Saab Bofors Dynamics, the AT4 was adopted by the United States Army after some reworking. Adopted by 21 countries, the AT4 is one of the most successful light missile launchers made.

In-game
The AT4 is used by ally Marines, but is unusable by the player. It's only used twice; both times in Shock and Awe. The first one is after some allies are let out near the statue. One of them has an AT4 and will fire it after hiding behind a wall. He's very close to you, so you should see him get into position and fire before you take off. The last time is when you get to the stranded allies in the under-construction building; one of them will fire it into the crowd of troops right before you get to the top.