What is the first step when cleaning the M240B's operating assembly?

The first step in cleaning the M240B's operating assembly is to disassemble the operating rod assembly. This step is crucial because it allows access to all the components that require thorough cleaning. Disassembling the operating rod helps ensure that dirt, carbon buildup, and other contaminants that may have accumulated during operation can be effectively removed from each individual piece.

By taking apart the assembly before any cleaning is initiated, it also prevents the risk of pushing dirt deeper into the mechanism or missing areas that need attention altogether. Once disassembled, each component can be properly cleaned, inspected for wear, and then lubricated as part of the maintenance routine, ensuring optimal functioning of the weapon system.