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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, which is affected by overheating, is used as a ground attack cannon used by aircraft, fitted on the Airship L30, Caproni Ca.5, Gotha G.IV, Airco DH.10, Hansa-Brandenburg G.I and C-Class Airship as a passenger weapon. This type of weapon is also used as the bow gunner's weapon on the M.A.S. Torpedo Boat.
The second type, with 15-round magazines but unlimited reserves, is usually reserved for ground vehicles, featuring as the driver's primary weapon as part of the Squad Support Package of the Mark V Landship, and as the secondary gunner's weapon on the Char 2C.
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.