Which air compressor is commonly used to operate small pneumatic tools?

The MC-2A is commonly used to operate small pneumatic tools due to its design and operational capabilities. This air compressor is lightweight and portable, making it ideal for tasks that involve quick mobility and efficiency, which are essential for operating various pneumatic hand tools. Its ability to deliver the required pressure and flow rate for these smaller tools makes it a preferred choice in many maintenance and repair scenarios.

In contrast, the other options, while they may serve specific functions within the munitions systems, are typically designed for different applications, such as higher output or larger operational scales. Therefore, the MC-2A's combination of portability, ease of use, and appropriate pressure output solidifies its suitability for smaller pneumatic tools.