Basic Firearm Cleaning

The internet will tell you everything from "clean after every single round" to "never clean anything ever." Both extremes are wrong.

Clean your gun when it actually needs it, not on some arbitrary schedule.

Modern firearms and ammunition are remarkably tolerant. Some competitive shooters report going thousands of rounds between cleanings without issues. But a defensive gun needs more attention than a competition gun—if your life might depend on it, err toward cleaner.

After shooting in Idaho weather—rain, snow, or our lovely spring mud—wipe it down and get the moisture off. You don't need a full teardown, but you do need to prevent rust.

Skip the $200 cleaning kits with forty brushes you'll never use.

Nice upgrades include gun-specific grease for slide rails, Q-tips for tight spots, and microfiber cloths. Universal cleaning kits run $20-50 and cover multiple calibers. Unless you're cleaning fifty guns, you don't need the deluxe range case with custom foam cutouts.

Before you start—unload the damn gun. Remove the magazine. Lock the slide back. Physically and visually confirm the chamber is empty. Then check again.

Before you start—unload the damn gun. Remove the magazine. Lock the slide back. Physically and visually confirm the chamber is empty. Then check again.

More people have shot holes in their walls during cleaning than want to admit it.

Work in a ventilated area. Most solvents smell like industrial accidents and work better than Ambien if you huff them in a closed room.

Field Strip

Take the gun apart to manufacturer specifications for field stripping—not a detail strip where you remove every pin and spring.

For semi-auto pistols, remove the magazine, lock the slide back, and follow the takedown procedure. Revolvers just need the cylinder swung out. ARs get the rear takedown pin popped, upper separated from lower, and the BCG and charging handle removed.

Your owner's manual shows how. Lost it? The manufacturer's website has PDFs. Can't find that? YouTube has 400 videos of someone field-stripping your exact model.

Don't go further than field stripping unless something's broken. Detail stripping is where people lose springs under the couch and create new curse words.

Clean the Barrel

The barrel is priority one. Carbon and copper fouling build up here, and accuracy suffers first.

Run a solvent-soaked patch through the bore. If using a cleaning rod, work from chamber to muzzle when possible to avoid damaging the crown. For pistols where that's awkward, bore snakes work great—pull from chamber toward muzzle.

Let the solvent sit 5-10 minutes. It needs time to break down fouling.

Attach a bronze brush, wet it with solvent, and make 10-15 passes through the bore. Use firm pressure but don't force it like you're augering fence post holes.

Run dry patches until they come out clean. This takes longer than you think. When you're sure it's clean, run two more patches—those will come out gray.

For heavy copper fouling, dedicated copper solvents work faster than general-purpose cleaners. Follow the product directions—some need to sit for 30 minutes.

Shine a light through the barrel. You should see clean, bright rifling. If it looks like a muddy drainage pipe, keep going. Run one lightly-oiled patch through to protect against rust.

Clean the Action

Spray or wipe solvent on the bolt face, breech, chamber, and any area where carbon builds up. The bolt face and extractor on semi-autos get crusty fast.

Use your nylon brush to scrub these areas. A dental pick works for caked-on carbon in corners. Don't go crazy—you're removing gunk, not repainting the Sistine Chapel.

For semi-auto pistols, clean the slide rails, barrel hood, and feed ramp. These areas affect reliability more than most people realize—a dirty feed ramp causes malfunctions.

Wipe everything down with clean patches until the black stops coming off. You won't get it perfectly clean, and that's fine.

External Surfaces

Wipe down all external metal surfaces with a lightly-oiled cloth. This prevents rust and removes fingerprints—human skin is surprisingly corrosive.

Check wooden stocks for dings or moisture damage. A little furniture wax or linseed oil maintains wood, but don't overdo it. For polymer frames, just wipe them clean. They don't need oil.

Lubrication

This is where people screw up. More oil is not better—excess oil attracts dirt and turns into abrasive grinding paste.

Semi-auto pistols need small drops of oil on slide rails, barrel hood, and anywhere metal rubs metal. Rack the slide a few times to distribute it, then wipe off excess.

Revolvers get light oil on the ejector rod, cylinder crane pivot, and anywhere parts move. Don't oil the chambers—oil in chambers can cause pressure issues.

Rifles need light oil on bolt lugs, bolt body, and contact points. ARs benefit from light grease on BCG contact points, but oil works too.

You want a thin film that feels slick, not puddles. If oil drips when you pick up the gun, you used too much.

Different shooters have different lubrication philosophies—some run guns wet, others nearly dry. Start with manufacturer recommendations and adjust based on your environment. Idaho's dry climate needs less oil than Houston's swamp air.

Reassemble and Function Check

Put the gun back together. If you have parts left over, you messed up.

Before loading anything, rack the slide or cycle the bolt several times. Pull the trigger in a safe direction with the gun still unloaded. Check that magazines seat properly. Verify safeties engage and disengage.

Load dummy rounds and check feeding. If everything works, you're done.

Basic firearm cleaning workflow - follow this sequence for consistent results

Don't over-clean. Obsessively cleaning your barrel after every magazine wears down the throat and damages the crown faster than shooting does. Some precision rifle shooters report better accuracy after 50-100 rounds of fouling.

Chemical and Tool Mistakes

Don't use household cleaners. WD-40 is not gun oil. Motor oil isn't gun oil. Vegetable oil definitely isn't gun oil.

Don't scrub rifling with steel brushes—bronze or nylon only. Steel-on-steel scrubbing removes metal.

Technique Errors

Don't forget to oil after cleaning. Solvent strips all protection. A cleaned and un-oiled gun rusts faster than a dirty one.

Don't force stuck patches. Work them back and forth gently. Forcing usually makes it worse.

Don't mix incompatible chemicals. Some solvents react badly with each other. Stick with one brand's system.

Guns sitting in safes for months need extra protection. Clean thoroughly and remove all moisture. Apply a heavier coat of oil or storage preservative to all metal. Consider desiccant packs in your safe to control humidity. Check every few months and re-oil if needed.

Long-term storage preparation steps for firearms stored months to years

Idaho's climate varies wildly. Boise valley humidity differs from mountain storage—adjust accordingly.

For truly long-term storage measured in years, Cosmoline works better than standard oil. Just know you'll spend an hour cleaning that garbage off before shooting again.

If you see any of the following, stop and take it to a gunsmith:

• Cracks anywhere on the firearm
• Bulged barrels
• Rust you can't remove
• Broken parts
• Anything that doesn't look right

A $50 inspection beats a hospital visit or a destroyed gun.

Keep cleaning supplies away from ammunition. Solvents and primers don't mix.

Dispose of used patches properly:

• Used patches are flammable - dispose properly
• Spontaneous combustion can occur with solvent-soaked materials
• Don't pile used cleaning materials
• Store cleaning supplies away from heat sources

Wash your hands after cleaning. Lead residue and solvents absorb through skin. Keep products away from kids and pets. Most taste terrible but that doesn't stop curious toddlers.

Clean guns work better than dirty guns. A slightly dirty gun that gets shot regularly beats a pristine safe queen every time. Focus on function over aesthetics.

A slightly dirty gun that gets shot regularly beats a pristine safe queen every time. Focus on function over aesthetics.

A few scratches and holster wear won't hurt anything. Carbon buildup in the chamber will.

Basic maintenance prevents most gun problems. Fifteen minutes of cleaning after shooting is cheaper than gunsmith bills or replacing corroded parts.

Your grandfather probably over-cleaned his guns. Your buddy who never cleans anything probably under-cleans his. Find your spot in between, based on how much you shoot and what conditions you encounter.

Hoppe's No. 9 cleaning basics haven't changed much in decades because the fundamentals haven't changed. Despite what the latest tactical cleaning system with seventeen steps wants to sell you, it's still just solvent, scrubbing, and oil.

• Long-Term Firearm Storage
• When to See a Gunsmith
• Safe Firearm Storage Options