This is the OMER Cayman Kanaloa Open Muzzle Speargun with Integrated Rail Cayman Aluminum Barrel. Developed with input by OMER team divers in Hawaii specifically for hunting in Hawaiian waters. Featuring an open muzzle and a silver anodized integrated rail Cayman aluminum barrel joined to a Cayman handle. This handle is the most reliable, comfortable, safe trigger mechanism on the market today. Kanaloa comes stock with an America 17/64" (6.75mm) threeshark fin shaft with cheater tab which also features our penetration cone. The rubber "comfy butt" makes loading more comfortable and the hand-tied single rubber comes with a soft wishbone. With the OMER Cayman ET speargun, you become a predator of the deep.