Keep It Running: A Simple Guide to AR Maintenance

The Miracle of Regular Maintenance

Basic maintenance is one of the easiest ways to get more life, more reliability, and more performance out of your AR. Even if cleaning isn’t your favorite part of a range day, a simple routine goes a long way in keeping your rifle cycling smoothly and preventing unnecessary wear. The good news: you don’t need special tools or advanced techniques; just a straightforward process and a few minutes of your time.

To show exactly what that routine looks like, Jim Ross walks step-by-step through his personal cleaning process in the video below. Follow along as he breaks down the rifle, explains what to clean, and demonstrates how to keep each component in good working order.

Step-By-Step Instructions

Before anything else, every cleaning session should start with safety:

  • Eye protection and gloves
  • Confirm the rifle is clear
  • Lock the bolt to the rear
  • Remove the chamber flag
  • Visually inspect the chamber

Only once the rifle is confirmed safe does the process begin.

Break the Rifle Down

Separate the rifle into major components:

  1. Use the chamber flag to push out the pivot and takedown pins

  2. Separate the upper and lower receiver groups

  3. Set each component on a clean work surface to avoid losing small parts

From here, start with the lower receiver.

Lower Receiver Maintenance

Buffer & Buffer Spring

These parts get dirty quickly and are simple to clean.

  • Wipe the buffer with a clean cloth until the carbon is gone

  • Clean the outside of the spring

  • For a deeper clean, run a cloth through the center of the spring and twist

This isn’t “white glove inspection” — just clean enough to store and run reliably. It’s also recommended to give the spring a quick check:

  • Look for cracks
  • Lightly bend and twist it
  • Make sure it still has strong tension

Springs with high round counts can lose some of their strength over time.

Receiver Extension (Buffer Tube)

The receiver extension collects dust and carbon:

  • Compressed air works well to clear debris
  • Alternatively, twist a rag into a tight plug and feed it into the tube
  • Rotate and pull it out to remove buildup
  • A nylon brush helps break up stubborn carbon

Once clean, visually inspect to ensure no gunk remains.

Fire Control Group

Check the sear and springs for buildup:

  • Use Q-tips or medical-grade swabs to wipe debris
  • Ensure everything moves freely

Before reassembly later, apply a thin layer of CLP by hand to the buffer spring — enough for a light sheen, not heavy saturation.

Recommended Tools

These are some of the tools that make the entire process much easier:

  • Firearm-specific CLP or cleaner
  • A clean cloth
  • Q-tips or medical-grade swabs
  • Nylon brush or old toothbrush
  • Plastic dental pick
  • Metal dental pick (used gently)
  • Bone-style bolt/carrier cleaning tool
  • Bore snake (or rod + patches)
  • Gun scrubber for extremely dirty rifles
  • Magnetized parts tray (optional)

IMPORTANT NOTE: Be careful when working with metal-on-metal. Use metal picks only lightly to avoid damaging finishes.

Bolt Carrier Group Breakdown

This is where most of the carbon lives, so be sure to take your time:

  1. Remove the firing pin retaining pin
  2. Tap out the firing pin
  3. Rotate the cam pin 90° and remove it
  4. Pull the bolt from the carrier

Now each part can be cleaned properly.

Carrier Interior Cleaning

To remove carbon inside the carrier:

  • Wipe the exterior with a dry cloth
  • Insert the bone tool into the front of the carrier
  • Twist to clear the carbon ring on the internal shoulder
  • Tap the carrier on the table to knock debris loose
  • Use a metal pick lightly for any stubborn spots
  • Twist a cloth into the carrier to wipe internal sidewalls clean

Repeat this process on the rear interior of the carrier. Keeping this area clean helps prevent issues like light primer strikes.

 

Upper Receiver & Chamber Maintenance

Bolt Carrier Group Breakdown

This is where most of the carbon lives, so be sure to take your time:

  1. Remove the firing pin retaining pin
  2. Tap out the firing pin
  3. Rotate the cam pin 90° and remove it
  4. Pull the bolt from the carrier

Now each part can be cleaned properly.

Carrier Interior Cleaning

To remove carbon inside the carrier:

  • Wipe the exterior with a dry cloth
  • Insert the bone tool into the front of the carrier
  • Twist to clear the carbon ring on the internal shoulder
  • Tap the carrier on the table to knock debris loose
  • Use a metal pick lightly for any stubborn spots
  • Twist a cloth into the carrier to wipe internal sidewalls clean

Repeat this process on the rear interior of the carrier. Keeping this area clean helps prevent issues like light primer strikes.

Bolt & Extractor Cleaning

Extractor Removal

Remove the extractor by:

  • Applying downward pressure
  • Using the firing pin to push out the extractor pin
  • Keeping track of the O-ring extractor booster on DD extractors

Extractor Cleaning

  • Scrub all surfaces with a nylon brush
  • Use a pick gently inside the extractor claw
  • Brush again to clear loosened carbon

Bolt Tail & Gas Rings

The bolt tail collects heavy buildup:

  • Place the bone tool over the bolt tail and rotate to remove brass fouling and carbon
  • Brush the bolt body and lugs
  • Inspect the gas rings
    • Ensure all three are present
    • Some play is normal
    • Gaps are normal by design

Reassemble the extractor by lining up the holes and reinserting the pin until flush. 

Firing Pin & Small Parts

The firing pin:

  • Wipe clean
  • Pay close attention to the rear, where carbon concentrates
  • Clean with the bone tool recess or a gentle metal pick

The cam pin and firing pin retaining pin get quick wipe-downs as well.

Upper Receiver & Chamber Cleaning

Use a nylon brush to knock carbon loose from the upper receiver interior, then:

Chamber

  • Dip a Q-tip in CLP
  • Run it into the chamber
  • Repeat until the swabs come out mostly clean
  • Leave a thin CLP film for protection

Upper Interior

Uses CLP-loaded swabs to wipe sidewalls and contact points.

Muzzle Device

Optional, unless running a suppressor:

  • Nylon brush for general cleaning
  • Brass brush + CLP for heavy buildup on suppressor brakes

Run a bore snake through the barrel:

  • Always from chamber to muzzle (same direction the bullet travels)
  • Two to three passes are enough for regular use

You don’t need to clean the bore every range trip, but after several hundred rounds, it’s worth doing.

Reassembly & Lubrication

Once everything is clean:

  • Apply a light coat of CLP to the bolt, carrier rails, and contact points
  • Reassemble the BCG
  • Reinstall the charging handle and BCG
  • Reinstall the buffer and spring
  • Pin the rifle back together
  • Perform a basic function check

Your rifle is now clean, lubricated, and ready for the next range day.

Every shooter wants a rifle they can trust, and trust is built one cleaning session at a time. When you follow the same maintenance routine Jim demonstrates in the youtube video, you’re not just wiping carbon away. You’re making sure your rifle continues to run the way a Daniel Defense rifle should.

Watch the video above, use this guide as your bench reference, and keep your rifle ready for whatever comes next.