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*AUG A1: Standard version introduced in 1977. Available with a choice of green or black furniture.
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*AUG A2: Similar to the A1, but features a redesigned charging handle and a detachable telescopic sight which can be replaced with a MIL-STD-1913-rail.
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*AUG 9 mm (AUG SMG/AUG Para): Chambered in 9x1 9mm Parabellum differs from A1 model in barrel, bolt, magazine and a magazine well adapter[7] which allows the rifle to feed from Steyr MPi 69 magazines. This version operates as a blowback firearm, without use of the rifle's gas system. For some time a kit of the above components was available to convert any AUG into a 9 mm SMG.