What should be used to clean powder fouling, corrosion, and dirt from the outside receiver and extension assembly?

Using a swab dipped in CLP (Cleaner, Lubricant, Preservative) and a cleaning brush is the most effective method for cleaning powder fouling, corrosion, and dirt from the outside of the receiver and extension assembly. CLP is specifically designed to clean, lubricate, and protect various components of firearms, making it ideal for this purpose. The lubricating properties of CLP help prevent rust and corrosion, while the cleaning capabilities allow for the removal of fouling and grime that accumulates during firing.

The cleaning brush helps in loosening and removing stubborn residues, ensuring the assembly remains in optimal working condition. This combination not only cleans the surfaces effectively but also preserves them for longer-term use, which is essential for maintaining the reliability and longevity of the firearm.

Other options fall short in providing a comprehensive cleaning solution. For example, while compressed air and a nylon brush can be useful for dust removal, they may not adequately address the residue or corrosion present on the metal surfaces. Similarly, using pure water and a soft cloth could leave moisture behind, potentially leading to rust without offering proper cleaning agents. Lastly, coarse materials like steel wool can damage the surfaces and should never be used on sensitive components like the receiver and extension assembly. Thus