and airfield defence guards (RAAF). The F88SA2 Austeyr was an upgrade of the F88 Austeyr that entered service in 2009 issued to units serving in the war in Afghanistan. It was withdrawn due to issues and reentered service in the end of 2010. The rifle had a two-tone colour with a "dark khaki undercarriage and a light brown upper to match" the Disruptive Pattern Desert Uniform. Design improvements included a modified gas system for increased reliability, an enlarged ejection port, a longer Picatinny Rail on top of the weapon, a modified sight housing and a side rail mount for a torch and Night Aiming Device (NAD). The F1A1 ammunition was improved to suit the F88SA2. The rifle could be fitted with a standard 1.5x sight or the Trijicon Advanced Combat Optical Gunsight (ACOG). The Advanced Individual Combat Weapon (AICW) developed by the Defence Science and Technology Organisation was an experimental weapon combining the barrel, action and magazine of an F88 Austeyr with an enlarged receiver and stock/body that also incorporates a multiple-shot 40 mm grenade launcher. Lithgow F90 The Lithgow F90 was officially adopted by the Australian Defence Force in 2015, it was then designated as the Enhanced F88 (EF88) Austeyr. Its nominal cyclic rate of fire is 740 rounds per minute. The EF88 is part of the LAND 125 Soldier Combat System project and is a significant upgrade to the F88SA2. It was developed and produced at the Australian Defence Industries factory in Lithgow Small Arms Factory, which is now owned by Thales Australia to fulfil current and near future requirements for the Australian Defence Force. It was first displayed to the public in the middle of 2012 and the initial production was scheduled for 2013, its final design and testing ended later on that year. Internally and externally the EF88 is still similar to the Steyr AUG, although it has received many distinctive upgrades and changes. Upgrades include the following: 1. Length of pull has been shortened by 15 mm. (The distance between the stock backplate and the grip; too long and it becomes difficult to handle on close quarters) 2. Longer top rail and a modular lower forend with side and bottom rails. 3. Floating barrel which increases accuracy. 4. Fluted barrel which dissipates heat from automatic fire. 5. Folding charging handle. 6. Improved butt design which has increased strength and a recessed ejection port cover to