Stands for "Military Simulation", an aspect of airsoft focusing on simulating actions of military infantry units, in regards to unit movements, used military gear, chain of command and standard procedures.
Simulation aspect is prevelent in all our airsoft activities, from tactics used by each individual member of our team, the team as a coherent unit and on strategic level - meaning: our team as a single unit, working together and coordinating with allied units in the field.
In Mil-Sim training our focus is to achieve the set mission objectives, rather than eliminating the entire opposition.
Certain rules of conduct apply here, such as: chain of command, communications procedures over radio, signaling and rules of engagement in simulated conflicts.