Nifty produced 8853 tonnes of copper in the first half of the year, behind where the company expected.
Metals X was around 4-6 weeks behind where it expected to be at the end of June, but the completion of the replacement of 4.4km of conveyer for the underground crusher was completed during the quarter, paving the way for a step change in production.
Metals X managing director Warren Hallam told the Noosa Mining and Exploration Conference that the company would double production from Nifty in the next six months.
Cashflow for the 2019 calendar year is forecast to be A$70-100 million.
"We'll be in harvest mode in six months," Hallam said.
The company will also drill for extensions to the Nifty orebody over 400m to the east.