Airsoft is a military simulation game played with electric (AEG, AEP, LPEG, MPEG), gas (GBB, GNB, Co2), bolts and spring-powered replica firearms. Generally these guns are copies of the real models used in the army such as M14, M4 MP7, AK-47, FAMAS….
Unlike Paintball markers, Airsoft guns shoot 6mm round pellets called BBs which don’t leave any traces of paint (don’t forget to use biodegradable BBs). By consequence Airsoft is based on fair-play and more focused on the game experience rather than competition.

Via Airsoft Squared