Arrow trap
An arrow trap is a trap which fires a +0 arrow when stepped upon by a player or monster. Only the dart trap is weaker. They hold 3-11 arrows and deal between 1 and 7+dungeon level to the player, or just between 1 and 7 to monsters. They can be disarmed with the Traps & Doors skill.
Repel Missiles and Deflect Missiles both reduce the chance of this trap being able to hit the player.