PNW Arms has developed cold tracer technology, which it plans to offer in the commercial market sometime in the fall. The cold tracer, mitigates the incendiary risk associated with using standard tracer ammunition.
Tracers are used in military application to correct fire in darkness or low-light conditions. The tracer has small pyrotechnic charge, which when ignited burns brightly. Current tracer technology also provides illumination in the IR spectrum, which is invisible to the naked eye. A tracer impact with any flammable material or fluid can ignite the target. They are also visible by more than just the shooter; an observer can locate the source of fire by observing the tracer flight path.
Video Demonstration of 9mm Cold Tracer Ammunition Fired from an MP5