What is close-quarters combat (CQC)?
Typically close-quarters combat means room-to-room fighting or clearing during a Hostage Rescue or Direct Action mission.
Most special operations units receive the basics of close-quarter combat training along with a manual-sized list of other related acronyms. The basics include how to shoot, move, fight, and communicate in a tight setting.
Most of the training we received in the Navy SEAL Teams for close-quarter combat used live fire. It was conducted under microscopic instruction by certified range-safety officers and it was recorded.