A deception system for deceiving enemy forces including a launcher, and pyrotechnic ammunition which is launched from the launcher and exploded at a location away from the launcher, wherein the pyrotechnic ammunition includes: a detonation mechanism which is set to detonate at the location away from the launcher, and pyrotechnic explosive material which is detonated by the detonation mechanism. When the pyrotechnic explosive material is detonated, a muzzle flash effect is created, and the muzzle flash effect is substantially similar to a real muzzle flash.