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How to Check Headspace on AR: A Comprehensive Guide
Checking the headspace on an AR (Automatic Rifle) is a crucial task for ensuring the firearm operates smoothly and safely. Whether you’re a seasoned marksman or a beginner, understanding how to check headspace is essential. In this guide, we’ll delve into the process, covering various aspects to help you master this skill.
Understanding Headspace
Headspace refers to the distance between the face of the bolt and the breech face of the chamber when the bolt is fully closed. It’s a critical dimension that affects the accuracy and reliability of the firearm. Proper headspace ensures that the cartridge case is fully supported and that the bullet is seated correctly in the chamber.
Tools Needed
Before you begin, gather the following tools:
- AR cleaning rod
- Headspace gauge
- Cartridge case
- Caliper
Step-by-Step Guide
Follow these steps to check the headspace on your AR:
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Remove the magazine and chamber flag to ensure the chamber is clear.
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Insert the cleaning rod into the chamber and push it all the way through to the bolt face.
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Secure the bolt in the receiver using the appropriate tool (e.g., a bolt hold tool or a T-handle).
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Insert the cartridge case into the chamber, ensuring it’s fully seated.
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Slide the bolt forward until it contacts the cartridge case.
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Remove the bolt and inspect the chamber for any signs of damage or excessive wear.
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Insert the headspace gauge into the chamber, ensuring it’s fully seated.
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Slide the bolt forward until it contacts the gauge.
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Remove the gauge and measure the distance between the gauge and the bolt face using a caliper.
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Compare the measured distance to the manufacturer’s specifications. If the headspace is within the acceptable range, the firearm is in good condition. If it’s outside the range, further inspection and adjustment may be necessary.
Table: Headspace Specifications
| Caliber | Minimum Headspace (inches) | Maximum Headspace (inches) |
|---|---|---|
| 5.56mm | 0.015 | 0.022 |
| 7.62mm | 0.015 | 0.022 |
| 223 Remington | 0.015 | 0.022 |
Common Issues and Solutions
Here are some common issues you may encounter while checking headspace and their potential solutions:
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Excessive Headspace: This can lead to accuracy issues and increased chamber pressure. To fix this, you may need to replace the chamber or have it reamed to the correct size.
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Insufficient Headspace: This can cause feeding and extraction problems. To address this, you may need to replace the bolt or have the bolt face reconditioned.
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Chamber Damage: If you notice any signs of damage, such as cracks or dents, it’s essential to have the chamber inspected and repaired by a professional.
Conclusion
Checking the headspace on your AR is a vital task that ensures the firearm operates safely and accurately. By following this guide and being aware of common issues, you can maintain your firearm in top condition. Always consult a professional if you’re unsure about any aspect of the process.