Leader Dynamics T2MK5

The Leader T2 MK5 Series weapons were chambered for the 5.56×45mm NATO cartridge and manufactured by Leader Dynamics of Smithfield, NSW, Australia (1978-1982/1983). The Leader was the brainchild of weapons designer Charles St. George. It was originally a contender for a 5.56 mm Australian military service rifle to replace the then-issued Lithgow L1A1-F1 SLR and Colt M16A1 rifles. What was unique about this endeavor was that Australia had never designed or manufactured its own commercial gas-operated semi-automatic rifle. The rifle was abandoned when the Steyr AUG was adopted for use by the Australian military.

Of interest to those that study weapons, designs and evolution, the T2 used a triangular bolt-face that was similar to the Winchester Model 100. This was adopted because the original bolt-face was too complex and expensive to manufacture. In a case of parallel development, Barrett Firearms uses a similar design for the M82A1 and its bolt action guns. St. George worked for Barrett at around this time but was not involved in design or engineering duties.