carries a fletchette gun and energy-discharging Slayspears, formerly able to transform the structure of matter into different bioenergy signatures that can stun, kill, paralyze, explode or disintegrate on contact
Harpoon's real name apparently originated somewhere on the internet. It's actual origin is unknown. Powerloss confirmed in New Avengers (1st series) #18. Since M-Day, Harpoon relies on artificial means to mimic his old powers.