"Napalm B-based incendiary explosive; creates lasting chemical fires that reach temperatures of 1200 degrees Celsius."
Armat U4 Firebomb description (from Aliens: Colonial Marines)
The U4 Firebomb, also known simply as the Firebomb, is a Napalm B-based incendiary explosive manufactured by Armat Battlefield Systems and used primarily by the United States Colonial Marine Corps.


The U4 Firebomb will erupt on impact, creating lasting chemical fires that can reach temperatures of 1200 degrees Celsius.

The U4 Firebomb is also the primary ammunition of the U4 Firebomb Launcher.


  • The Firebomb is very effective in tight corridors where it can completely block an enemy's path.