at Work Bench It can be crafted at Work Bench.
Nano Bullet sits in the Expert-mode only tier of Terraria progression based on its rarity rating (3).
Menacing is the strongest prefix for Nano Bullet — +4% damage — best offensive accessory prefix.
Nano Bullet deals 15 base damage, 10-tick use time, 20% crit chance. Use the DPS calculator to see expected damage per second with prefixes and crit applied.