More than likely a laser sight, since the human eye cannot see infrared.
More than likely a laser sight, since the human eye cannot see infrared.
The red dot could have come from an infrared illuminator which come in different sizes from pen-light-sized to spotlight-sized. They generate heat like a portable fast-food heat lamp and in doing so they do generate a faint light. As seen through light-amplification the IR beam illuminates like a spotlight. I've used this gear.