Leader Dynamics Series T2 MK5 information

T2 MK5 Assault Rifle/Carbine
Semi-auto US import Leader T2
Type	Assault rifle carbine
Place of origin	Australia
Service history
Used by	Australia
Production history
Designer	Charles St. George
Designed	1978
Manufacturer	Leader Dynamics Australian Automatic Arms
Produced	1980s-1996
Specifications
Mass	7.5 lb (3.40 kg)
Length	38 in (965 mm)
Barrel length	16.125 in (410 mm)
Cartridge	5.56×45mm NATO
Caliber	5.56mm
Action	Gas-operated
Rate of fire	700 rpm
Feed system	Various STANAG Magazines.
Sights	Iron sights

The Leader T2 MK5 Series firearms 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 British 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 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 firearms, 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.