M4

The 37 mm Automatic Gun, M4, known as the T9 during development, was a 37 mm (1.46 in) recoil-operated autocannon designed by Browning Arms Company and entered service in 1942. The M4 and its variants would primarily be manufactured by Colt's Manufacturing Company and Oldsmobile and is therefore sometimes referred to as the "Colt M4" or "Oldsmobile M4." It was primarily mounted in the Bell P-39 Airacobra and P-63 Kingcobra, with the U.S. Navy also using it on many PT boats.

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1942  Wikimedia, Wikidata
37 mm Automatic Gun, M4; M4 cannon; T9
autocannon, United States, 

autocannon, BK 37, COW 37 mm gun, M10, M230 chain gun, M39 cannon, MK 30, Oerlikon KDG, Shpitalny Sh-37, 

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Location: KML, Cluster Map, Maps,

1942-01-01T00:00:00Z

1942-01-01T00:00:00Z

1942 M4

1939-09-01T00:00:00Z

1939-09-01T00:00:00Z

World War II Q362

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Frameless

M54 round drawing

M4 cannon drawing

37mm T9 cannon

M4 cannon Keski-Suomen ilmailumuseo

Propellor hub and M4 cannon from P-39 Airacobra at the Museu do Ar, Alverca. 19-9-2022 (53740125754)

Type	Subtype	Date	Description	Notes	Source
commons	image		M54 round drawing		Commons
commons	image		M4 cannon drawing		Commons
commons	image		37mm T9 cannon		Commons
commons	image		M4 cannon Keski-Suomen ilmailumuseo		Commons
commons	image		Propellor hub and M4 cannon from P-39 Airacobra at the Museu do Ar, Alverca. 19-9-2022 (53740125754)		Commons