The Flintlock Pistol is a gun that fires bullets. Sporting a fast attack speed, it deals 10 base damage. It can be bought from the Arms Dealer. It does not deal any knockback.
Its best modifier is Demonic, as it does not have any knockback and thus cannot get modifiers that affect it. It can also get the Deadly modifier, which, while the Demonic modifier may provide the greatest damage per hit, grants a higher increase to the overall DPS.
Even though it is based off a real life Flintlock Pistol, it more closely resembles a Revolver (comparison). In reality, the single-shot rate of fire of flintlock pistols and muskets are very similar; however, in Terraria, the Flintlock Pistol's speed is 16 (very fast), compared to the Musket's speed of 35 (slow).