The Steyr AUG series is an Austrian licensed series of assault rifles that use the bull-pup configuration, where the buttplate is attached directly to the receiver. This solution offers very compact rifles with long barrels, despite of its compact size. On the A2 you get an accessory rail where you can mount your preferred aiming device. Like on the A1 version the front grip is collapsible and the internals are metal constructed. The gearbox has a quick change spring feature that allows for a fast change in muzzle velocity should the circumstances demand it.