Lithgow has chosen the Australian-made Southern Cross TSP-X alloy chassis as the basis for the Outback, a rifle intended for more heavy-duty use such as culling or shooting from a vehicle. It features a 46cm (18”) barrel, 10-round AICS metal box magazine, a compact overall length of 97cm and a mass of just over 4kg. The Outback also features a fluted bolt and bolt handle. The chassis provides many mounting options for optics, lights and other accessories. It is chambered for .223, .243, 6.5CM and .308.