Generation Unsubdued Nuclear Drive Assault Module অথবা General Purpose Utility Non-Discontinuity Augmentation Maneuvering Weapon System অথবা Gigantic Unilateral Numerous Dominating Ammunition অথবা Gunnery United Nuclear Duetrion Advanced Maneuver System অথবা General Unilateral Neuro-Link Dispersive Autonomic Maneuver System all of them from gun series their all right.