Hammerhead Evolution 2, Aluminum Barrel Speargun, Made in Hawaii -EVOLUTION? the incremental succession of speargun perfection. THE MOST ACCURATE speargun in America as independently tested by Hawaii Skindiver Magazine* and Spearing Magazine out of Florida**. Confidence in your ability and equipment puts fish on the plate. Every element of the HammerHead Evolution2? complements the next for consistent and accurate shots of dive-in and dive-out under the most demanding of situations. The unique precision of the HammerHead Evolution2? starts with the streamlined and hydrodynamic Evolution2? Open Muzzle that holds twin Power Helix? Bands. To further guide the shot and minimize speargun recoil and ?kick? the barrels of all HammerHead Evolution2? pose a slick track and are ballasted for neutrality, sound dampening, and recoil minimization. All Evolution2? Spearguns are then matched with precision-machined American-made 17-4 Stainless Steel Heat Treat Shafts designed with pin tabs set 2.5" from the rear to maximize band stretch and power. Contoured ergonomic grips maintain the diver?s wrist in a ?strong-fist? position allowing the diver to maximize their strength while firing to prevent recoil and kick with increasing shot power. Additionally, the Evolution2? model features an adjustable trigger pull to accommodate a wide range of hand sizes and glove thicknesses.