Phoenix Feather Airsoft talks about gas power in airsoft, and the diffences between the colour-designated gases... "Today we are going to look at all different types of Airsoft Gas and when to use which one! We have light performance Blue Gas, standard performance Green Gas, professional performance Red Gas, and the extreme performance Black Gas by Nimrod Tactical – but which Airsoft Gas do I use when and what is Black gas? I will explain in this Airsoft Gas Guide and answer your question of how to choose the correct Gas and which Airsoft Gas is the best for you! Of course, we test all the different kinds of Gasses in a funny shooting test, enjoy!"