Russian tank gun and artillery bore cleaning unit.
https://s3-us-west-1.amazonaws.com/h...l_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...896#post144544
https://www.homemadetools.net/forum/...585#post159036
https://www.homemadetools.net/forum/...566#post139439
https://www.homemadetools.net/forum/...538#post143024
https://www.homemadetools.net/forum/...305#post146263
