Why were bow guns on tanks removed in a majority of later models

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Why aren't tank cannons ever belt fed? - Quora

Which modern tank has the most devastating main gun installed on

Why were the gun barrels so short on WWI tanks? - Quora

Why were the gun barrels so short on WWI tanks? - Quora

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What is the purpose of bow guns in some of the WW2 tanks? - Quora

Why did the blunderbuss have a horn on the end of the barrel? - Quora