A 3D printer and suspected "homemade" gun components seized during police raids in Manchester are being examined.
Detectives initially said the parts were a "plastic magazine and trigger" which could make a "viable" gun.
But the man held on suspicion of making gunpowder has told the BBC they are actually sections of a 3D printer.
Greater Manchester Police (GMP) now say they "cannot categorically say" whether they had recovered the component parts for a gun.
Judith Moritz reports.