Abstract: A weapon emulator has a muzzle flash emulator attachment coupled to a first end of a barrel. The muzzle flash emulator attachment includes: a body defining a plurality of slots, a cover disposed in the body, a light source at least partially disposed in the cover, and a circuit coupled to the light source and including a power source and a switch. The switch is transitionable from an open state to a closed state to turn on the light source in response to pulling a trigger. In another embodiment, a muzzle flash emulator assembly includes a magnet operatively aligned with a reed switch. In a further embodiment, a muzzle flash emulator has a member coupled to a barrel and moveable to strike the switch in response to pulling the trigger to transition the switch from the open state to the closed state.