Abstract: An assembly for producing air projectiles. The assembly includes a driver with an attached converging nozzle. The driver includes a flexible diaphragm and is responsive to an electrical control signal to displace the flexible diaphragm from a first position to a second position. In one embodiment, the driver is an audio speaker driver such as a woofer and the diaphragm is a speaker cone or diaphragm. The nozzle has an inner bore or chamber that converges from a first size at a first end proximate to the driver to a second, smaller size at a second distal end. The second end of the nozzle may include a planar muzzle extending perpendicular to a central axis of the bore and including an outlet smaller than the diaphragm diameter. The driver has a rapid response to control signals such as less than about 20 milliseconds to produce a projectile at the muzzle.