Ensuring the proper function and safety of your firearm is paramount. One crucial aspect often overlooked is regular chamber inspection, and this is where go and no-go gauges for 5.56mm (.223 Remington) rifles become indispensable tools. These gauges provide a quick and easy way to verify the headspace of your rifle's chamber, preventing potentially catastrophic malfunctions. This guide will explain what go and no-go gauges are, how to use them, and why they're essential for responsible firearm ownership.
Understanding Go and No-Go Gauges
Go and no-go gauges are precision-machined tools designed to check the critical headspace dimension of a firearm's chamber. Headspace is the distance between the bolt face and the breech face of the cartridge case when the round is chambered. Incorrect headspace can lead to dangerous malfunctions, including:
- Squib loads: A partial or complete failure of the propellant to ignite, resulting in a bullet lodged in the barrel.
- Case head separation: The cartridge case splitting at the base, potentially causing significant damage to the firearm and injury to the shooter.
- Bolt face damage: Excessive headspace can cause the bolt to strike the case with excessive force, damaging both the bolt and the case.
A go gauge is designed to fit snugly into a correctly dimensioned chamber. It should slide in easily but with some resistance. A no-go gauge represents the maximum acceptable headspace. It should not enter the chamber if the headspace is within safe parameters.
Using Go and No-Go Gauges: A Step-by-Step Guide
Using these gauges is straightforward, but precision and safety are paramount. Follow these steps carefully:
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Clean the Chamber: Before using the gauges, thoroughly clean the chamber of your rifle to remove any debris that might interfere with the accuracy of the test.
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Insert the Go Gauge: Gently insert the go gauge into the chamber. It should slide in relatively easily but with some resistance, indicating that the headspace is within the acceptable minimum. If it's too loose or too tight, further inspection is required.
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Insert the No-Go Gauge: Attempt to insert the no-go gauge. This gauge should not enter the chamber. If it does, your headspace is excessive, and you should immediately cease using the firearm.
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Interpret the Results:
- Go gauge fits, no-go gauge does not: Headspace is within safe limits.
- Go gauge fits, no-go gauge fits: Headspace is excessive, and the firearm is unsafe to use. Seek professional help from a qualified gunsmith immediately.
- Go gauge does not fit: Headspace is insufficient, this is less common and also requires professional attention from a gunsmith.
Why 5.56mm Go and No-Go Gauges are Essential
Regular headspace checks are crucial for responsible firearm ownership, especially with a high-velocity cartridge like the 5.56mm. These gauges offer a simple, inexpensive, and effective way to:
- Prevent catastrophic malfunctions: Identifying headspace issues early can prevent potentially dangerous situations.
- Increase firearm longevity: Proper headspace ensures that your firearm operates as designed, reducing wear and tear.
- Ensure safe shooting: This is the most important aspect. Your safety and the safety of those around you should always come first.
Choosing and Maintaining Your Gauges
When selecting your 5.56mm go and no-go gauges, ensure they're sourced from a reputable manufacturer known for their precision machining. Proper storage and care are essential to maintain gauge accuracy. Keep them clean, dry, and in their protective case when not in use.
Conclusion
Investing in a set of 5.56mm go and no-go gauges is a small price to pay for peace of mind and the safety of yourself and others. Regular headspace checks are a vital part of responsible firearm maintenance. Don’t delay; get your gauges today and ensure your 5.56mm firearm remains safe and reliable. Remember to always consult with a qualified gunsmith if you have any doubts or concerns.
