The Steyr AUG (Armee-Universal-Gewehr) is not just a rifle; it is a piece of engineering art. Adopted by the Austrian military in 1978, its revolutionary bullpup design—where the action and magazine sit behind the trigger—changed the landscape of modern firearms.

Features a chrome-lined bore for durability.

The (Part #AUG-EX) is small and easy to lose. Always refer to the Steyr AUG parts diagram when reassembling the bolt head because the extractor pin must be driven in from the correct direction (usually right-to-left).

This article serves as your definitive visual and textual guide to the anatomy of the Steyer AUG. We will break down the rifle by assembly groups, explain the function of critical components, and explain why a detailed parts diagram is the most important tool in your armory kit.

The core of the bullpup design is the receiver, which houses the barrel, the bolt carrier group, and the gas system. In a parts diagram, this is often the most complex visual cluster.

This is the heart of the rifle. In a typical exploded view, the BCG is shown floating above the stock. Components include: