Corvus Defensio Case Deflector

The Corvus Defensio Case Deflector solves one of the most common issues in combat shooting the Steyr AUG. In modern shooting training, weak hand shooting is a special challenge for every shooter. With almost all modern semi-automatic guns, this is easily possible, since the case is ejected to the side, downwards or forwards. However the Steyr AUG ejects the cases to the rear. It is thus only possible to shoot strong hand, as with the other shoulder the empty cases are thrown directly into the face of the shooter which can distract or even hurt him.

The Corvus Defensio Case Deflector ejects cases forward or to the side and thus makes it ideal to shoot in every combat stance, from either shoulder, without any additional modifications or adaptations. The rifle can be used by a right or left handed shooter without installing a different bolt and changing the ejection port cover. Installation requires no drilling or modification to the stock as the two piece Case Deflector is simply plugged into the ejection port and tightened with two screws.  Because it is made of hard anodized 7075 aluminum, the plastic stock is also protected against damage when an empty case is not completely ejected.


  • Mounts directly to the ejection port
  • Fits the Steyr AUG (all versions except 9 mm)
  • Deflects ejected cases forward or to the side, away from the shooter’s face.
  • Allows weak hand or cross-shoulder stances
  • Made of hard anodized 7075 aluminum
  • Length: 31mm (1.22”)  Width: 24mm (0.94”)  Height: 22,5mm (0.89”)
  • Weight: 30 gm (1.06 oz)


  • Unscrew the Corvus Defensio Case Deflector screws completely.
  • Put the two parts of the Case Deflector together
  • Place the Case Deflector in the ejection port with the wedge shaped piece at the rear.
  • Insert and alternately tighten the two screws until the Case Deflector sits firmly in the ejection port.
  • Note:  It is recommended to apply thread locker to the screws before the final assembly since otherwise, they could loosen during use!
  • Be careful not to over-tighten the screws to avoid bending the frame or stripping the threads.