Where is the serial number located on a Daisy Champion 99?

The serial number on a Daisy Champion 99 air rifle is typically located on the underside of the receiver, near the trigger guard. It may also be found on the left side of the receiver or on the barrel. It's advisable to clean the area gently to ensure the serial number is legible. If you're having trouble locating it, consulting the owner's manual may provide additional guidance.