The mold is an object that is recovered from the Shadow Island Fort by Aline Cedrac in Alone in the Dark: The New Nightmare.
The New Nightmare[]
Aline locates one of the mold of metal cases closed with a chain (openable with the pincer) at the Fort. The object must be subsequently inserted into the foundry of Jeremy Morton's Laboratory together with the Steel Ingot so as to obtain the Perforator barrel.