Gomu Gomu no Red Hawk (ゴムゴムの火拳銃(レッドホーク) Gomu Gomu no Reddo Hōku, literally meaning "Rubber Rubber Fire Pistol")
A Haki enhanced version of Gomu Gomu no Jet Bullet. After entering Gear Second, Luffy uses Busoshoku Haki to harden his arm. He then stretches it back like Gomu Gomu no Bullet. Though when cocked back, his arm ignites, releasing a stream of fire.