Aimrite�s Venom railgun was designed to provide spearfishing enthusiasts a top of the line Aluminum railgun at an affordable price. The aluminum Venom accomodates twin 9/16" bands while firing the more rigid spring steel European notched shafts. Shaft sizes include 6.6, and 7.0 mm. The shaft rides atop Aimrite�s integral track which also adds strength and rigidity to the barrel. Each gun is individually hand assembled and tested with all precision engineered Aimrite components. Guns come "ready to use".