Originally Posted by TheDutch
Don't worry about Remington's response. They have the screwiest serial number system in the gun world. Half the time they can't even figure it out. APPEARS
In the US that barrel would be a problem, under 18". The grip and forend handle are manufactured by several different companies here. The receiver
to be an 870 Remington. If the forend has an action bar on both sides it is probably an 870. Remington is one of the few gun manufacturers that put the twin action bars on their pump gun. Excellent design for strength and durability. My bet it is a Remington and the person you contacted at Remington doesn't know how to read a serial number. If your uncle bought the shotgun in Turkey it might be a different sterilization. I don't know.
Give this site a try to see what pops up: