* F88 Austeyr: The Australian Army's modified version of the Steyr AUG A1. Changes for the Australian version include a bayonet lug, a 1:7 rifling twist as found in the M16A2 optimised for the heavier 62-grain NATO standard round (SS109/M855), a cross hair inside the circular 'doughnut' reticle, and an "automatic lockout" selector that can physically lock out the fully automatic position of the 2-stage trigger mechanism found on the standard AUG. The AUG won a competition against the prototype of what would become the Bushmaster M17S. The components are built under license at the Australian Defence Industries factory in Lithgow, New South Wales (now known as Thales Australia).
* F88C Austeyr: A carbine version of the Austeyr F88 featuring a shorter, 407 mm (16.0 in) barrel. The F88C is generally used as a personal defensive weapon where maneuverability is an issue, such as in armoured vehicles.
* F88S Austeyr: A version of the Australian Austeyr F88 with an integrated Picatinny rail in place of the standard optic that allows the attachment of various sights (night vision devices, magnified and non-magnified optics such as the ELCAN C79, Trijicon ACOG or Aimpoint).
* F88S-A1C: The Austeyr F88S-A1C is a compact variant of the F88 fitted with a Picatinny rail. The rifle has a 407 mm (16.0 in) barrel. Typically issued to front-line combat infantry units with room and weight constraints such as cavalry, reconnaissance, light horse, paratroopers and airfield defence guards (RAAF).
* F88 GLA: Australian Army version with an M203 grenade launcher. It features an Inter-bar (armourer attached) interface, an RM Equipment M203PI grenade launcher, and a Knight's Armament quadrant sight assembly to which a Firepoint red dot sight is attached. The bayonet lugs and forward vertical foregrip are removed.
* F88T: ADI has developed a .22-caliber training rifle for use by the Australian Army. The rifle provides an economical training alternative, with very low ammunition cost, which can be used in environmentally sensitive training areas and ranges where "overshooting" is an issue, and there is less likely of a chance to injure instructors and other persons. Also used by the Australian Defence Force Cadets.
* Austeyr F88A4: ADI’s proposed F88A4 will incorporate multiple Picatinny rails for the fitting of legacy systems such as the M203P1 40 mm grenade launcher as well as both commercial off-the-shelf (COTS) and military off-the-shelf (MOTS) sighting and battle enhancement accessories. Also it must be noted that the A4 has only been bought in limited numbers (reportedly only 10 units) for evaluation purposes.
* DSTO Advanced Individual Combat Weapon: Experimental weapon combining the barrel, action and magazine of a Austeyr F88 with an enlarged receiver and stock/body that also incorporates a multiple-shot 40 mm grenade launcher.