MONSTRO-VIPER (Genetically Enhanced Bio-Beast) 1992 G.I. Joe MEGA MONSTERS Series Action Figure MONSTRO-VIPER (Genetically Enhanced Bio-Beast) 1992 G.I. Joe MEGA MONSTERS Series Action Figure From the evil labs of Dr. Mindbender come the hideous, genetically enhanced Cobra Mega-Monsters! These soldiers are the toughest troops Cobra's ever come up with. Watch out Joes! There's a monster of a fight brewing! Monstro-Viper's spring-action arm throws gut bombs. Figure stands approximately 5 inches tall. Originally released in 1992. Retired / Out of production. Ages 5 and up. From Hasbro