Opero 77 Weapon in Arknights: Endfield

Opero 77 is a 3-Star Polearm weapon in Arknights: Endfield. Check out the best characters for Opero 77, its stats, unique effect at each level, and upgrade materials.

• Type: Polearm
• Rarity: ★★★
• Max Level: 90
• Passive: Assault: Armament Prep

All Weapons in Arknights: Endfield

Listed below are any of our character guides that use Opero 77. Please check their respective character guides for more information on how good of a weapon Opero 77 is for them.

Opero 77 uses Cast Die, Auronyx, Heavy Cast Die, Kalkonyx, Umbronyx, Igneosite, and Metadiastima Photoemission Tube for breakthrough upgrades.

Use the slider to see cumulative materials needed for each breakthrough stage of Opero 77.

"...therefore, I must re-emphasize the necessity of making field practicality the prime design objective of any weapon — and that means the fuller grooves on 77 are obsolete and redundant features that serve no purpose! You must understand that our enemies neither bleed nor feel pain. Stop adopting design elements from those Rhodes Island engineering drawings.
Aesthetics?! I am taking that very personally, sir. The greatest virtue of any weapon lies not in its appearance! If I wanted to make things look nice, I would be working at Mieszko Industries and not at this blasted place!
— Meeting minutes of the third design conference for Opero 79"