How to Clean an AR-15 After Shooting
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
Field strip the AR-15, clean the bolt carrier group with solvent, scrub the barrel from chamber to muzzle, wipe down the upper and lower receivers, and lubricate all moving parts before reassembly.
How This Affects Longevity
Regular cleaning prevents carbon buildup that causes malfunctions and extends your rifle's service life. The direct impingement gas system dumps fouling directly into the action, making post-shooting maintenance critical for reliability. Proper cleaning technique protects your investment and ensures consistent performance.
The Detail
Start by ensuring the rifle is completely unloaded and pointed in a safe direction. Remove the rear takedown pin and separate the upper from the lower receiver. Pull the charging handle and bolt carrier group straight out of the upper receiver. The bolt carrier group accumulates the most fouling since hot gas and carbon blow directly into it during firing.
Focus your cleaning efforts on the bolt carrier group components. Use a quality gun solvent to break down carbon buildup on the bolt, bolt carrier, and gas key. A nylon brush works well for scrubbing without scratching surfaces. Pay special attention to the bolt face, gas rings, and the interior of the bolt carrier where carbon accumulates heavily. Clean the firing pin and cam pin areas thoroughly.
Clean the barrel from the chamber end whenever possible to avoid damaging the crown. Run solvent-soaked patches through until they come out clean, then follow with dry patches. Use a bronze brush if copper fouling is present, but avoid over-brushing. The chamber and barrel extension also need attention since they see high pressure and heat.
Wipe down the upper and lower receivers with a clean cloth and appropriate solvent. The trigger group in the lower receiver typically needs less frequent deep cleaning, but remove any debris or moisture. Check the buffer tube and spring for proper function. Apply a light coat of quality gun oil to all moving parts including the bolt carrier group, charging handle, and trigger components before reassembly.
Build Impact
Understanding proper cleaning procedures influences your choice of finishes, coatings, and materials during a build. Chrome-lined barrels and nickel boron bolt carrier groups reduce cleaning time and resist corrosion better than standard phosphate finishes.