What should be used to remove loose dirt and carbon buildup from the slide assembly?

Using a soft brush and CLP (Clean, Lube, Protect) is the most appropriate method for removing loose dirt and carbon buildup from the slide assembly of the M9 Service Pistol. The soft brush is effective because it can gently dislodge debris without scratching or damaging the metal surfaces of the slide. CLP serves a dual purpose; it not only cleans but also lubricates and protects the metal parts, creating an optimal condition for the firearm to function smoothly.

This combination ensures that any residual carbon and dirt are effectively managed without compromising the integrity of the slide assembly. Additionally, using CLP helps prevent future buildup by providing a protective layer. This is critical for maintaining the performance and longevity of the firearm, which is essential for safe and effective operation.