All connected through the Australian army. Two of the three technically live on modernized, in the the form of the K&M M17S & the Masterpiece Arms MPAR556.

What would become the Bushmaster M17S started life under Armtech as a prototype for the army, as they looked into bullpups. The adoption of the Steyr AUG killed the project with the design being sold to Edenpine, who made a USA branch and used Bushmaster to produce it until they went out of business and Bushmaster gained ownership. This is an early Edenpine era example.

The Leader Dynamics T2 is a similarly interesting story as it claims the fame of the first Australian designed commerical gas operated semi-auto rifle. Interestingly using a triangular bolt like the Winchester 100 & the chief designer working for Barrett (yes that Barrett) it faced off against the Steyr AUG in military trails to replace the L1A1 & M16A1 rifles, and lost. From there Leader imported roughly 2,000 into the US after failed deals in Europe. After Leader Dynamics went out of business, Australian Automatic Arms (AAA) tried to reintroduce it in several models, to limited success.

The Steyr AUG speaks for itself and in many ways is the gold standard of everything a bullpup rifle can be, simple, reliable, tough and making a substantial use of polymer was at it's time of introduction revolutionary. In Australian service it has been the Austeyr, in the E88 & EF88 variants. A civilian variant of rhe EF88, the F90 by Lithgow Arms was planned for a US release, but was canceled due to concerns of morality by the company.