The Instinct is the "smaller brother" of Primatist sharing the precious body.

It has more squared lines: the idea was to create a well-finished gun, but also a gun that can be used for every type of ambush.

This spearfish gun is made for a quick use and it is able to shoot the spear shafts at high speed.


Technical data

Size: 85cm/ 100cm/ 115cm

Propulsive system: FKDemo2


  • Stainless inverse backward Phoseidon "PH2" trigger, adjustable in height and depth and 180° rolling in order to have a precise millimetric calibration
  • Anatomic right or left handle with grip
  • Burnish stainless Roi Pins or Phoseidon Pins 7mm/7.5mm spear shaft with precharged shark fins
  • Vertical Ermes Falco or Leonardo fishing reel
  • Wood kit TS Roisub
  • Rubbers kit Roisub Sprint 21mm/17mm
  • Dyneema PSK 91 lanyard - polyurethane impregnation cut resistant
  • Stainless screws
  • Rubber chest pad reinforcement
  • Stainless cam clamp (optional)

Body composition: Aged planking wood selected in nine Mogano Sapelli and Okoùmé batons + Iroko handle

Gluing: Special industrial building glue used for top level carpentry: specific for naval gluing - three times endurance compared with tradition epoxy resin

Finishing line: Made with latest generation products, specific for wood and used into shipyard only:

  • two coats of wood sealing (double wood-porosity penetration compared with the traditional epoxy resin)
  • two coats of acrylic paint (for yacht high performances) with opaque finishing
  • one coat of cut resistant paint

Power range: FKD2 more than double roller with additional rubber

Use range: White fish fishing, big pelagic fishes and predators with different techniques:

  • Deep ambush
  • Ambush
  • Verfical dive-gliding gently towards the fish
  • On hold spearfishing

Precision range:

  • Shooting in 6-8m range from the tip of the spear shaft depending on the shaft's length
  • Spear shaft penetrationg from 50% to 100% of its length
  • Average speed: no comparison with the other propulsive systems on the market

Price: range price starting from 1060€

For further information, please fill in the form in the Contacts section or write an email to


General information:

The Roisub reserves the right to replace the components with their updated version or with equal products that can improve the gun.