Are angels real ..yes sir..so are swords..do you believe Jesus will return with a sword sticking out of His mouth?
The literal interpretive method calls us to use scripture to explain scripture and to identify that which is figurative/symbolic.
The sword IS EXPLAINED in scripture as being figurative of the Word of God.
Ephesians 6:17 Take the helmet of salvation and the sword of the Spirit, which is the word of God.
Hebrews 4:12 For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart.
Revelation 19: 13He is dressed in a robe dipped in blood, and his name is the Word of God. 14The armies of heaven were following him, riding on white horses and dressed in fine linen, white and clean. 15Out of his mouth comes a sharp sword with which to strike down the nations.
The chains are not viewed figuratively but as real and divinely effective.
Jude 1:6 And the angels who did not keep their positions of authority but abandoned their own homethese he has kept in darkness, bound with everlasting chains for judgment on the great Day.