The Foundation of Safe Shooting: Understanding Headspace
Headspace Defined
Before we explore the No Go Gauge, it’s essential to grasp the concept of headspace. Imagine a chamber, the heart of your rifle where the magic happens. This is where the cartridge, the bullet, propellant, and primer, reside. Headspace, in simple terms, is the distance between the bolt face (the surface that contacts the base of the cartridge) and a specific point in the chamber. That crucial point can vary depending on the design of the firearm, usually the shoulder of the cartridge case.
The Importance of Proper Headspace
Think of it like a perfect fit. Too much space, and the cartridge might not be held securely, potentially leading to dangerous malfunctions. Too little space, and the bolt might not fully close, or worse, the cartridge could be crushed. Both scenarios pose serious risks, making proper headspace essential for safe and reliable operation.
Risks of Incorrect Headspace
Incorrect headspace can lead to a variety of issues, all of which compromise safety and accuracy. Consider these potential problems:
Failure to Fire (FTF) or Failure to Extract (FTE): If the headspace is excessive, the firing pin may not strike the primer with enough force to ignite the propellant. Alternatively, the bolt might not fully lock, hindering extraction.
Case Rupture or Separation: Excessive headspace can stretch the cartridge case during firing. If the case stretches beyond its limits, it can rupture, releasing hot gases and debris, potentially injuring the shooter and damaging the firearm.
Catastrophic Firearm Failure: In severe cases of improper headspace, the firearm may experience a catastrophic failure, potentially resulting in the barrel or receiver breaking.
Safety Hazards: Besides the potential for injury, incorrect headspace can result in unpredictable firing, making the firearm dangerous to handle.
Clearly, proper headspace is fundamental for ensuring the safe and accurate performance of your firearm. Ignoring this aspect of maintenance can have potentially serious consequences, underlining the importance of tools like the 5.56 NATO No Go Gauge.
Introducing the Tool: Function and Purpose of the No Go Gauge
Understanding the Gauge
A No Go Gauge is a precisely manufactured tool designed to measure the headspace of a firearm. It’s an invaluable asset for any responsible gun owner or gunsmith. Specifically designed for 5.56x45mm NATO chambers, the No Go Gauge is an extension of the more basic “Go” gauge and helps to verify if a chamber is within safe and appropriate tolerances.
Physical Description
Physically, a No Go Gauge resembles a cartridge, but it’s made of hardened steel with a slightly longer overall length than a standard “Go” gauge. This precise dimension makes it the ideal instrument to determine the chamber’s characteristics and dimensions, allowing one to tell if they chamber exceeds the maximum safe headspace length.
How It Works
How does a No Go Gauge work? The process is surprisingly straightforward, but understanding the mechanics is key:
Preparation: Before anything else, ensure the firearm is completely unloaded and safe. Remove the magazine and physically inspect the chamber to confirm that no ammunition is present. This includes clearing the chamber, making sure there are no rounds.
Disassembly (if required): Some firearms require partial disassembly to access the chamber, especially bolt action rifles. This may involve removing the bolt carrier group. Consult your firearm’s manual for specific instructions.
Chamber Cleaning: Clean the chamber to eliminate any debris. This guarantees a precise measurement.
Insertion: Insert the No Go Gauge into the chamber. Make sure the gauge sits fully.
Bolt Closure: Carefully close the bolt on the No Go Gauge, exactly as you would close it on a loaded round. Use a smooth, even motion.
Interpretation: The next step depends on the design of your firearm.
Bolt Closes: If the bolt closes completely, without resistance, then the headspace is outside of the acceptable range. This is a bad outcome, and the headspace may need to be adjusted by a qualified gunsmith.
Bolt Does Not Close: If the bolt will not fully close, or closes with significant resistance and binding, then the headspace is within the acceptable range. This is a good result.
The No Go Gauge provides a direct, objective measure of headspace, ensuring that your firearm operates safely and accurately. It is a non-negotiable tool for the gun owner who prioritizes safety and the longevity of their firearm.
When to Utilize the 5.56 No Go Gauge: The Importance of Regular Checks
Critical Times for Checking
Knowing when to use the No Go Gauge is as vital as knowing how to use it. There are several critical times when a headspace check with a No Go Gauge is imperative:
New Firearm Purchases: Before firing any newly acquired firearm, always perform a headspace check. This is essential, especially if you’re purchasing a used rifle, as you have no prior knowledge of the rifle’s history or the quality of workmanship performed.
After Gunsmithing or Armorer Work: Any work performed on the firearm, from a barrel swap to a bolt replacement, can affect headspace. Always verify headspace after any work affecting the chamber or bolt.
Component Replacement: Replacing the bolt, barrel, or other critical components requires a headspace check to ensure the firearm functions correctly.
Troubleshooting Issues: When dealing with FTF or FTE problems, a headspace check is a critical diagnostic tool.
Routine Maintenance and Inspections: Incorporate headspace checks into your regular firearm maintenance routine, particularly if you shoot your firearm frequently.
In essence, the No Go Gauge should be a permanent fixture in your firearm maintenance kit, safeguarding your safety and preserving the integrity of your valuable equipment.
Hands-on: Step-by-Step Guide for Effective Use
Safety First
Let’s walk through the procedure for using a 5.56 NATO No Go Gauge, ensuring maximum safety and accuracy:
Prioritize Safety: Before you even touch the firearm, ensure that the muzzle is pointed in a safe direction. Verify the chamber is unloaded, and the magazine is removed.
Field Strip (as needed): Disassemble the bolt carrier group. Consult your rifle’s owner’s manual for specific instructions.
Chamber Clean: Use a chamber brush and solvent to thoroughly clean the chamber. Remove any debris or fouling, ensuring a clean contact surface for the gauge.
Introduce the Gauge: Insert the No Go Gauge into the chamber. Make sure it is seated fully.
Bolt Closure (The Moment of Truth): Carefully close the bolt in a slow and controlled manner. Ensure that you are not forcing the bolt. If it closes, the headspace is likely out of specification.
Interpretation and Action:
If the bolt closes fully, then the headspace is likely too large.
If the bolt does not close fully, or closes with notable resistance, then the headspace is acceptable.
Reassembly: Reassemble the firearm, following the instructions in your owner’s manual. After reassembling, cycle the action multiple times to ensure smooth operation.
Follow this step-by-step guide, and you can confidently check the headspace of your firearm.
Addressing Potential Issues and Seeking Expert Help
Common Problems
Despite best efforts, there might be instances where you encounter difficulties. Here are some common issues and recommended courses of action:
Bolt Won’t Close: This typically indicates acceptable headspace. However, if you encounter excessive resistance, further investigation may be necessary. Check for any obstructions in the chamber, such as a stuck case or debris. If the issue persists, consult a qualified gunsmith.
Bolt Closes with No Go Gauge: This is a serious red flag. This likely means the chamber is too large, which is an unsafe condition. Do not fire the firearm! Take it to a qualified gunsmith immediately for evaluation and potential repair.
When to Get Help
It’s important to recognize your limits. If you are uncertain about any step of the process, or if you encounter unexpected results, do not hesitate to seek professional assistance. A qualified gunsmith possesses the expertise and tools to diagnose and resolve any issues related to headspace or other firearm malfunctions.
Acquiring Your 5.56 NATO No Go Gauge: Buying Guidance
Choosing a Gauge
Purchasing a No Go Gauge is a crucial step in safeguarding your firearm. Here are some important considerations:
Reputable Brands: Look for well-known, established manufacturers specializing in gunsmithing tools. These brands typically have quality products that meet or exceed specifications.
Retailers: Buy your No Go Gauge from reputable gun stores or online retailers specializing in firearms and accessories. Be sure the retailer offers customer support, and has the capability to offer refunds.
Quality and Calibration: Ensure that the gauge is made of high-quality steel and is properly calibrated. Calibration certification is a sign of quality control.
Storage: Store your gauge in a safe, clean, and dry environment. Proper care will help keep the tool in good working condition.
Investing in a reliable 5.56 NATO No Go Gauge is an investment in your safety and in the longevity of your firearm. By choosing a reputable brand and following proper storage and use guidelines, you can ensure your firearm continues to perform safely and accurately for years to come.
Conclusion: Headspace, Safety, and Responsible Firearm Ownership
The 5.56 NATO No Go Gauge is an indispensable tool for any responsible firearm owner. By understanding headspace, knowing how to use a No Go Gauge, and integrating regular headspace checks into your firearm maintenance routine, you significantly reduce the risk of dangerous malfunctions and enhance the accuracy and reliability of your firearm. This dedication to safety and responsible firearm ownership is not only a matter of personal protection but also a contribution to the preservation of our Second Amendment rights. Prioritize your safety and the safety of those around you. Take the time to familiarize yourself with your firearm, understand the tools that help maintain its safety, and always follow safe handling practices. This commitment is paramount.
