Flak-cannon
From Warhammer 40k - Lexicanum
Flak-cannons are multi-barreled Autocannons, that were used by the Sons of Sek during the Sabbat Worlds Crusade[1b]. They rapidly fire hard[1a] shell[1b] rounds[1a] and can either be stationary[1b] or pulled on trailers by other vehicles, such as SteG-4s.[1a]