The rear release device is very sensitive thanks to the use of stainless steel and elongated internal linkages. This allows you to obtain smoothness when shooting even with powerful equipment. The barrel is cylindrical in aluminum and has an integral shaft guide that directs the shaft at the moment of shooting. The stem is characterized by multicolored camouflage. The header is open with 3 holes and can accommodate circular elastics. The Omer Performer 2 elastics with Dyneema bindings equip this speargun. The equipment of the Invictus Rex includes a double 14 mm elastic band with a 6.5 mm single-fin Omer America shaft with fins.