120×570mm NATO - Wikipedia
https://en.wikipedia.org/wiki/120%C3%97570mm_NATO
WEB120×570mm ammunition manufactured by IMI. 120×570mm NATO tank ammunition (4.7 inch), also known as 120×570mmR, is a common, NATO -standard (STANAG 4385), tank gun semi-combustible cartridge used by 120mm smoothbore guns, superseding the earlier 105×617mmR cartridge used in NATO-standard rifled tank guns.
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