CQB Close Quarters Battle is a combat technique that takes place in a short-distance zone that requires the use of suitable replicas with rapid securing strategies. Speed as well as teamwork are major aspects of this practice.
CQB is initially training designed to prepare military personnel, police officers and gendarmes to intervene in buildings, houses and other short-distance situations. It is part of the training for GIGN, SWAT, FBI and many other units called upon to apprehend dangerous individuals or recover hostages in enemy territory.
One of the important points is to synchronize actions: if you proceed with a rapid entry into a room or house, intervening through two different access points when you are in a team adds a surprise effect and therefore allows you to neutralize your opponent more easily. Progression in shouldered aiming mode in small corridors is favored to optimize your team advancement while ensuring you maintain maximum reflexes if an enemy appears.
Summary:

To be most effective during CQB, here are detailed replicas to favor or not during this practice:

Communication between team members is a central element. This type of game will also help create better cohesion between players who must progress as a unit. The development of new tactics and strategies as well as group cohesion brings an addictive realism situation to the game and strengthens teamwork.
CQB enhances your reflexes and your choices with repeated group actions.
In this video, we can see an Airsoft team advancing in a building in CQB with a rapid approach, area securing using replicas mainly of pistol type for short distance and assault rifles for corridors. Teamwork is key for rapid and efficient area capture.