How to clean an AR-15 after deer season?

Disassembly and Cleaning

Begin by removing the magazine and clearing the chamber. Take apart the upper and lower receivers, and set aside any accessories such as the forward assist or charging handle. Use a soft brush to sweep away any loose debris and fouling from the interior of the upper receiver. Next, mix a cleaning solution according to the manufacturer’s instructions and apply it to the bore, using a cleaning rod to work the solvent into the barrel. Allow the solvent to sit for at least 10 minutes to allow it to penetrate and break down any stubborn fouling.

Solvent and Cleaning Rod Techniques

When using a cleaning rod, apply gentle to moderate pressure, increasing as needed to remove stubborn fouling. Use a series of patches, working from coarse to fine, to remove the fouling and solvent. Avoid using excessive force, which can damage the barrel or other components. For particularly stubborn fouling, use a combination of solvent and a bore snake to work the cleaning solution into the barrel. This can be especially effective for removing copper fouling and other stubborn contaminants.

Assembly and Lubrication

After cleaning the AR-15, reassemble the upper and lower receivers, making sure to properly align and secure all components. Apply a small amount of lubricant to the moving parts, such as the bolt carrier group and the trigger group. Use a light touch and avoid applying too much lubricant, as this can attract dirt and debris. Finally, inspect the rifle to ensure all components are properly assembled and functioning correctly.