bore sight
(firearms) An optical device, mounted on or near the end of a firearm's barrel, used to align the sights with the bore.
(Australia, New Zealand, transitive) To cheat or defraud.
Initialism of Robert Downey Jr., American actor and singer.
plural of co-commander
彼は射撃前に銃の照準を合わせるため、銃身に銃身照準器を取り付けた。
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