What size wrench is used to tighten the medium clevis?

The appropriate choice regarding the medium clevis usage is based on the principle that these components are designed to be tightened by hand, ensuring easy adjustments and maintenance in operational conditions. This hand-tightening is particularly beneficial because it allows for quick changes in equipment assembly or disassembly without the need for additional tools, which can be crucial in tactical environments where speed and efficiency are paramount.

In contrast, the other options suggest specific sizes of wrenches that imply a need for a tool to secure the clevis. However, using a wrench can lead to over-tightening, which could damage the clevis or impair its functionality. Therefore, hand-tightening is the standard practice for ensuring that the clevis remains secure while also allowing for flexibility in use. This method is explicitly recommended for both safety and practicality in field operations.