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- Main article: 20mm Cannon#Battlefield 1
The 20mm Autocannon is a vehicle-mounted weapon that appears in three versions - all types use explosive ammunition fed from a top-mounted magazine, although ammunition is effectively unlimited.
The first type is a ground attack cannon used by aircraft, fitted on the Airship L30, Caproni Ca.5 and Gotha G.IV as a passenger weapon, which is affected by overheating. The second type is for ground vehicles, featuring as the driver's primary weapon as part of the Squad Support Package of the Mark V Landship, and on the bow of the M.A.S. Torpedo Boat, with 15-round magazines but unlimited reserves. A third static-emplaced Becker M2, denoted in the killfeed as the HE Auto-Cannon, can found in the wreckage of a gondola of the Airship on Giant's Shadow. The emplacement uses overheating to limit use.