* A quiver of arrows - This is the most common and probably the most widely understood.
* A flight of arrows - This emphasizes their ability to be launched.
* A sheaf of arrows - This evokes a sense of the arrows being bundled together.
* A volley of arrows - This emphasizes their use in a rapid, coordinated attack.
Ultimately, the best collective noun for arrows depends on the context and the specific image you want to create.