AB Biller Redesigned Professional Speargun, Stainless or Wood (Made in USA) Hardened Stainless Spring Steel Tip, with Double Barb, Swivel and Safety Cap. Stainless Spring Steel shaft, 5/16" hardened to Rockwell 44C. Open Muzzle for easy top loading. All natural rubber slings, 9/16" O.D. with stainless steel wishbone, Muzzle, grip and butt are rugged plastic. Redesigned, patented safety allows for easy, one-handed operation featuring silent lock and unlock. Adapts for both right and left-handed position. Patented trigger mechanism manufactured from hardened stainless spring steel and housed in a Nylon cartridge provides smooth and reliable trigger action.