Force had adopted the F88 Austeyr and designated it as the IW Steyr (Individual Weapon Steyr). However the New Zealand Defence Force has since adopted the Lewis Machine and Tool, Mars-L 5.56mm rifle and phased out the IW Steyr. New Zealand variants of the Steyr were equipped with a single-stage trigger and a two-position safety. The sight added a crosshair to the circle reticule. New Zealand issued both factory and locally modified carbines alongside the full-length rifle variant. Variants AUG The Steyr AUG is a bullpup assault rifle chambered in 5.56×45mm NATO. It was introduced in 1978 and was adopted by the Austrian Army and was designated as the StG 77 in 1978, then it was later adopted by several military agencies around the world. The Steyr AUG A1 is an improved variant of the AUG and was introduced in 1982. It is available with a choice of olive or black furniture. The Steyr AUG M203 is an AUG A1 fitted with the M203 grenade launcher. The Steyr AUG AG-C is an AUG A1 fitted with the AG-C grenade launcher. The Steyr AUG A2 features a redesigned charging handle and a detachable telescopic sight which can be replaced with a MIL-STD-1913 rail. Due to its modularity, a 24-inch barrel can be used and a Picatinny rail section can be fitted instead of the folding grip, where a bipod can be installed. The rifle was introduced in December 1997. The Steyr AUG A3 features a MIL-STD-1913 rail on top of the receiver and an external bolt release. The Steyr AUG A3 SF features an MIL-STD-1913 rails mounted on the telescopic sight and on the right side of the receiver, and includes an external bolt release. The integrated telescopic sight is offered in 1.5× or 3× magnification. The Steyr AUG A3-CQC was a prototype development of the AUG A3 and was first displayed by Steyr at the SHOT Show 2006. It differs in having a railed handguard attached ahead of the receiver. Due to the need to remove this extra railed section in order to strip the rifle for cleaning, it featured a quick detach lever mounted on the left side to remove the rail. Due to the concerns over the extra cost and weight, along with potential issues with the reliability and consistency of the detachable handguard, the prototypes received little interest and were last seen promoted by Steyr in 2008