How to Field Strip an AR 15 or AR 10 – Step-by-Step Breakdown

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This guide walks through the complete field strip of an AR 15 and AR 10. Every step is covered — from verifying the chamber to removing the BCG and buffer — so you can clean, inspect, and keep your rifle running right.

TL;DR – How To Field Strip an AR-15 or AR-10

• Drop the magazine and confirm the chamber is clear

• Push the takedown pin to separate the receivers

• Remove the BCG and charging handle

• Optional: Remove buffer and spring for deeper inspection

• Same process works for most AR-10 platforms

The AR platform is known for reliability and modularity — but like any tool, it needs maintenance. This guide walks you through a full field strip of both the AR-15 and AR-10, including buffer removal, safety tips, and visual inspection points. If you’re troubleshooting or just keeping your rifle clean, this is the no-guesswork breakdown.

🔗 For malfunctions, check the full AR-15 Troubleshooting Guide

🛠 Tools You’ll Want for AR-15 / AR-10 Field Stripping

• Real Avid AR-15 Smart Mat

• Real Avid Bench Block

• Aegis Gun Care – Save 10% with code BOOMLUBE

• Soft towel or mat

• Nylon cleaning brush

• Flashlight for chamber and BCG inspection

How to Field Strip an AR-15 or AR-10

Step 1: Clear the Firearm

1. Place the safety on SAFE

2. Remove the magazine using the magazine release button

3. Pull the charging handle to the rear

4. Lock the bolt open with the bolt catch

5. Confirm the chamber is clear

Step 2: Separate Upper and Lower Receivers

1. Push the rear takedown pin left to right

2. Pivot the upper open like a shotgun

3. (Optional) Push the front pivot pin to fully separate receivers

Step 3: Remove BCG and Charging Handle

1. Pull charging handle rearward

2. Remove the bolt carrier group (BCG)

3. Slide out the charging handle

Step 4 (Optional): Remove Buffer and Action Spring

1. Press the buffer retainer

2. Pull out the buffer and spring

💡 Most cleaning and inspections can be done at this stage. Full disassembly (e.g., bolt or gas system) requires tools.

🔍 What To Inspect During an AR Field Strip

• BCG – Carbon around bolt tail, extractor, gas rings

• Firing Pin – Look for peening or drag marks

• Buffer/Spring – Corrosion or bent buffer face

• Chamber/Extension – Fouling or burrs with flashlight

• Bolt Lugs – Wear, cracks, or peening

⚠️ Safety Tips When Field Stripping ARs

• Always point the muzzle in a safe direction

• Double-check the chamber is empty

• Control the buffer spring during removal

• Support upper/lower with a mat or towel

• Use a flashlight to inspect internals

How to Reassemble an AR-15 or AR-10

Step 1: Reinstall the Buffer and Spring (If Removed)

• Insert the action spring into the buffer tube

• Push the buffer in behind it until the retainer clicks into place

Step 2: Insert the Charging Handle

• Align the charging handle’s tabs with the receiver cutouts

• Slide it partway in until it catches

Step 3: Reinsert the Bolt Carrier Group (BCG)

• Pull the bolt forward in the carrier

• Align the BCG and insert it into the upper receiver while guiding the charging handle

• Push both in until fully seated

Step 4: Rejoin the Upper and Lower Receivers

• Align the pivot pin and close the receivers

• Push in the takedown pin until it locks

Step 5: Function Check

• Rack the charging handle

• Put the safety on and pull the trigger (it should not fire)

• Put the safety off and pull the trigger (it should click)

• Rack again and reset the hammer—ensure proper operation

FAQ – AR-15 / AR-10 Field Strip

What’s the difference between AR-15 and AR-10 field strip steps?

The process is the same. AR-10s are larger and may have stiffer springs or different bolt geometry.

Can I field strip my AR without any tools?

Yes. Hands only. No tools needed.

Should I remove the buffer every time?

No. Only if cleaning the tube or inspecting wear.

How often should I field strip?

After each range trip or exposure to dust, dirt, or water.

What if my BCG won’t come out?

Check for obstruction. Tap lightly. Never force it.

Why Field Stripping Matters for ARs

This isn’t just cleaning — it’s confidence.

Field stripping your AR shows you how the rifle works. It helps catch problems before they matter. Whether prepping for patrol, training, or home defense, this step keeps your rifle reliable.

🔗 Need to diagnose an issue? Hit the AR Troubleshooting Guide

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About the Author: Jason Schaller is a former FFL holder and founder of Eagle Eye Shooters Supply in Helena, MT, where he provided professional gunsmithing services and guided customers on all aspects of firearms ownership. Today, he teaches DIY gunsmithing at The Rogue Banshee and serves as a Chief Instructor at Freedom Crew University. With over a decade of hands-on professional experience with firearms and nearly 30 years in IT, Jason also holds top cybersecurity certifications including CISSP, CISA, and CRISC. When he’s not geeking out, he’s helping others build self-reliance, critical thinking, and firearms proficiency through real-world content.

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