.357 long barrel

 is a type of weapon mod in Fallout: New Vegas.

Effects
Increases the weapons damage by 3.

Appearances
The appears in Fallout: New Vegas.

Bugs
The barrel will only show while holstering your weapon or while sprinting with it. When aiming, walking or standing still, wielding it, how ever, the barrel will not show and the revolver will look like it did without any mods.