The Steyr AUG is an Austrian select fire assault rifle. It uses the 5.56x45mm NATO cartridge and the standard variant comes most the time with non-electronic scope. Many variants of this rifle have been made including a light machine gun variant, a submachine gun variant firing 9x19mm Parabellum, a semi-automatic civilian variant and more. It is a bullpup rifle, meaning that the magazine and firing mechanism is behind the trigger, so the barrel can be longer than on conventional assault rifles without increasing the overall length of the rifle. It also means that its stock is heavier than on standard assault rifles, which can affect aiming and balance characteristics. Bullpup rifles also tend to have "squishier" triggers, with a longer takeup and less clean break. However, due to the location of the ejection port on bullpup rifles, firing a right-handed model of a bullpup rifle with your left hand and vice versa will likely result in hot spent cases flying in your face. Some bullpup rifles have solved this problem by ejecting downward or forward. The Steyr AUG has an effective range of about 300 meters.
The Steyr AUG is the standard military weapon of its home country, Austria. It has also been adopted by armed forces of Argentina, Bolivia, Ecuador, Republic ofIreland, Luxembourg, Saudi-Arabia, Tunisia and Pakistan. It is also used by the U.S. Custom service. Also is version of it manufactured in Australia, and used by their and New Zealand's armed forces. The cartridge it uses, the 5.56x45mm NATO is one of the most used in the world.
AUG rifles can have their bolt and ejection ports configured for either right or left-handed shooters; it should be noted, though, that although swapping which side the rifle ejects spent cartridges from is possible, it is not possible to change this in a heated situation, meaning that a user will be unable to fire the weapon properly from their non-dominant side. This also means that the user will be unable to fire the weapon from their strong side around a corner bearing on their strong side without exposing most of their body; this is a negative characteristic shared among almost all bullpup rifles that do not feature downward case ejection.