Used in the early part of World War II on many submarines and other warships as anti-aircraft guns, but they were nearly useless in that role. They were replaced as rapidly as possible with the 20 mm Oerlikon AA MG.
There were at least four main types used: The Browning MG in both air-cooled and water-cooled versions using belt feed, the Lewis gun with old-fashioned magazines and the Marlin with a belt feed. Unless otherwise noted, the data below is for the Browning MG.
|Designation||0.30" (7.62 mm) Browning Machine Gun (BMG)
0.30" (7.62 mm) Lewis Machine Gun
0.30" (7.62 mm) Marlin Machine Gun
|Ship Class Used On||Older submarines and many surface ships|
|Date Of Design||about 1925 (Original Design)|
|Date In Service||about 1930|
|Gun Length oa||N/A|
|Rate of Fire||400 - 700 rounds per minute cyclic|