Marvel Masterpieces Metallurgy Jack Flag by Dave Palumbo
Real Name: Jack Harrison
Major Appearance: CAptain America #434, 1994
With his weaponized boombox, Jack Flag packed the firepower necessary to take on the Serpent Society. He first faced them after a bank robbery, where he used his fighting prowess to take them down. But his skulls weren't enough for King Cobra, who wknicked him out. Even with hthis defeat, he continued fight and gained new Super Hero powers after a fight with Mr. Hyde.