licence from Steyr Mannlicher AG at the Lithgow Small Arms Factory, by Australian Defence Industries (ADI) which is now owned by Thales Australia. The changes made from the original Steyr AUG include a bayonet lug, a 1:7 in rifling pitch as found in the M16A2 assault rifle, optimised for the heavier 62-grain NATO-standard SS109/M855 round and an "automatic lockout" trigger that can physically disable the fully automatic position of the two-stage trigger mechanism found on the standard AUG. It had a cyclic rate of fire of around 680–850 rounds per minute and incorporated a crosshair doughnut sight. The F88C Austeyr was the carbine variant of the F88 Austeyr that featured a shorter barrel. It was generally used as a personal defensive weapon where manoeuvrability is an issue, such as in armoured vehicles. The F88T Austeyr is a training rifle that is chambered in .22 Long Rifle cartridge. 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 a lower risk of injuring instructors and other persons. The F88T is used for training by the Australian Defence Force Cadets. The F88S (Special) Austeyr was a variant of the F88 Austeyr that entered service in 1998 with an Accuracy International Mounting System (AIMS) to allow the attachment of a different sighting device. In 2001, the Grenade Launcher Attachment (GLA) replaced the M203 grenade launcher from the M16A1 that had been fitted to the F88 and also the M79 grenade launcher. The GLA was a RM Equipment M203PI grenade launcher and a Knight's Armament quadrant sight assembly with a Firepoint red dot sight together with an Inter-bar (armourer attached) interface. The bayonet lug and forward vertical grip were removed. The F88SA1 Austeyr was an upgrade of the F88 Austeyr that entered service in 2003. The F88SA1 had an integrated Picatinny rail in place of the standard optical sight. The rail allowed the attachment of various other sighting devices (night vision scopes, magnified and non-magnified optics such as the ELCAN C79, Trijicon ACOG or Aimpoint). The F88S was withdrawn from service. The F88SA1C Austeyr was the carbine variant of the F88SA1 Austeyr fitted with a Picatinny rail. The rifle had a barrel. Typically issued to front-line combat infantry units with room and weight constraints such as cavalry, Military Police, reconnaissance, light horse, paratroopers