WW2 U.S. .30 MG flash hider

A very rare item!
It is a WW2 flash hider for the Cal .30 Browning machine gun.
These were meant for hiding the flash when firing the gun, so perfect for hiding were the machinegun position was.
Part was in storage for more then 60 years and was greased up to prevent rusting.
I have removed the most of the grease, but if you want to use it again, you will still need to clean the inside.

Markings: marked with a number / see pictures
Condition: unused