Star Z70B sub macine gun ( deactivated )

This is a very unusual Z70 i believe it to have been a film prop, The original textured finish has been removed and it has been blued, tho it now shows signs of age and wear.
the gun is part stripable, the welded barrel is fixed. the bolt, moves and latches a piston behind the trigger.
It cocks and dry fires, working safety, folding stock, comes with seven inert 9mm display rounds.
deactivation stamps on gun parts, this gun can not chamber a round or be made to fire