King James Bible
King James Version (KJV)

Probably from a primary hepo (to be busy about); an implement or utensil or tool (literally or figuratively, especially, offensive for war) -- armour, instrument, weapon.
1. plural arms used in warfare, weapons: John 18:3; 2 Corinthians 10:4; metaphorically, τῆς δικαιοσύνης, which ἡ δικαιοσύνη furnishes, 2 Corinthians 6:7; τοῦ φωτός, adapted to the light, such as light demands, Romans 13:12 (here L marginal reading ἔργα).
2. an instrument: ὅπλα ἀδικίας, for committing unrighteousness, opposed to ὅπλα δικαιοσύνης, for practising righteousness, Romans 6:13.