Steyr StG 77, aka the AUG

Published on September 7, 2025
Duration: 1:10

This guide details the operation of the Steyr AUG (StG 77), focusing on its unique controls and barrel removal process. Expert Ian McCollum highlights the rifle's revolutionary polymer construction and integrated optic. The progressive trigger system allows for both semi-automatic and full-automatic fire based on trigger pull length.

Quick Summary

The Steyr AUG (StG 77) is a revolutionary bullpup rifle known for its extensive polymer construction and integrated 1.5x optic. Its progressive trigger system allows for semi-automatic fire with a short pull and full-automatic fire with a longer pull. The barrel can be quickly changed by pressing a release button and rotating the assembly.

Chapters

  1. 00:00Introduction and Design
  2. 00:12Controls and Trigger System
  3. 00:27Charging Handle and Barrel Removal
  4. 00:40Internal Fire Control Group

Frequently Asked Questions

What are the key features of the Steyr AUG (StG 77)?

The Steyr AUG, also known as the StG 77, is recognized for its futuristic bullpup design, extensive use of polymer for reduced weight, and an integrated 1.5x optic. It also features a unique progressive trigger system.

How does the progressive trigger on the Steyr AUG work?

The progressive trigger on the Steyr AUG allows for two firing modes based on pull depth. A short, light pull will result in semi-automatic fire, while a longer, heavier pull will engage full-automatic fire.

How is the barrel changed on the Steyr AUG?

The Steyr AUG features a quick-change barrel system. To remove the barrel, a release button is pressed, and then the barrel assembly is rotated off the receiver, allowing for rapid replacement in the field.

What caliber is the Steyr AUG (StG 77)?

The Steyr AUG (StG 77) is chambered in 5.56mm NATO, a standard military rifle cartridge known for its effectiveness and widespread use in various firearms platforms worldwide.

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