Blowgun

Tube for firing light projectiles or darts

A blowgun is a simple ranged weapon consisting of a long narrow tube for shooting light projectiles such as darts. It operates by having the projectile placed inside the pipe and using the force created by forced exhalation ("blow") to pneumatically propel the projectile. The propulsive power is limited by the strength of the user's respiratory muscles and the vital capacity of their lungs.

This keyword could refer to multiple things. Here are some suggestions: