Yurchenko double __: vault now called the Biles II (4)

I believe the answer is:

pike

(Other definitions for pike that I've seen before include "Spearhead attached to a long pole" , "Former infantry weapon" , "Fish - old infantry weapon" , "Voracious freshwater fish" , "Old weapon -- Dad's Army character" .)

I've seen this clue in the LA Times.

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