Gun Dragon is a series of DARKMachinemonsters. This series focuses heavily upon the usage of coin tossing to activate their effects to destroy your opponent's cards on the field. The appearance of this series seem to be based on firearms (although the English language TCG censored the gun portions, changing them to lasers) and usually have "dragon" in their name, though they aren't of the Type (this is similar to the naming scheme of the Cyber Dragonarchetype).
1 card on the field after banishing 1 Tuner from your hand, GY, or face-up field
Playing style[]
As noted above, a Gun Dragon Deck will focus upon getting the needed advantage during a coin toss so using "Second Coin Toss" will be useful to increase the chance of activating their effects. Being Machine monsters, Gun Dragon monsters can also be supported by Machine support cards such as "Limiter Removal" and "Machina Fortress".