Sectus XPR-90 Speargun

XPR-90

After an extensive period of design and testing, we present our new speargun model, the XPR-90.

Its development was based on a specific concept, the XPR (Extreme Power Ratio) approach, which defines the relationship between the energy delivered to the shaft and the actual length of the speargun. The goal was to achieve the performance of a significantly longer speargun, without sacrificing the handling and speed of a 90 cm platform.

A key factor in achieving this is the exceptionally long effective band stretch, which goes well beyond the typical standards of multi-roller spearguns. The main band (137 cm stretch) along with the auxiliary bands are arranged in a configuration that utilizes nearly the entire available length of the speargun.

The auxiliary 14.5 mm bands are set in a continuous loop, without wishbones, and are anchored as far back as possible in specially shaped positions on the wooden body, close to the reel. This ensures that their entire length remains active, significantly increasing the effective stretch compared to conventional setups.

The shaping of the wooden body in this area has been carefully designed to ensure proper band alignment along the barrel, without interference or unnecessary bending, while at the same time maintaining exceptionally smooth and easy loading, despite the overall power of the setup.

The body maintains a very low profile, allowing for effortless movement in the water. Internally, a carbon fiber tube has been integrated to increase rigidity and minimize deformation during loading and firing.

At the same time, the internal air volume improves buoyancy, keeping the speargun well-balanced and easy to handle in the water.

The custom-designed carbon pulleys, developed specifically for this project, weigh only 15 grams per pair, helping keep the front-end mass low. Combined with ceramic bearings in both the pulleys and the head rollers, they ensure smooth operation and reduced friction.

The main band hooks are made of full carbon, reducing weight at the front and improving buoyancy.

The shaft guide consists of 5 contact points, symmetrically positioned and carbon-coated, while the rest of the track is recessed. This design allows the shaft to contact only where necessary, reducing friction and enabling higher exit velocity.

The band setup consists of 1 × 17.5 mm and 2 × 14 .5 mm Sigal Extreme bands, while the shaft is a double-flopper 7.2 mm, 120 cm, selected to maintain high speed along with the necessary inertia for long-range shots.

The trigger mechanism is Ermes, proven under high loads, while the handle is available in ambidextrous or semi-anatomic form with a non-slip grip.

The XPR-90 represents an approach where performance is not based on excessive power, but on the efficient use of every individual component, aiming for maximum utilization of length and available energy.