From Lexicanum

Autocannon are similar in concept to twentieth century tank guns. They are rapid firing and use mass-reactive explosive ammunition. They are usually either mounted on weapon carriages or vehicles because of their great weight.

Due to their high rate of fire and sufficient killing power, they are effective against heavy infantry and light vehicles. Autocannons are used by the Imperial Guard, Space Marines, Witch Hunters and Chaos Space Marines.

Famous Autocannon users

• Trooper 'Try Again' Bragg - Tanith First and Only

Sources

• Warhammer 40,000: Wargear
• Warhammer 40,000: Rogue Trader
• Codex: Imperial Guard (3rd Edition, 2nd Codex)

Related articles

• Auto Weapons