How to Measure Gas Tube Length

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How to Measure Gas Tube Length

The gas tube is an important component of a firearm’s gas system, as it helps to regulate the flow of gases from the barrel to the action. When it comes to replacing or upgrading your gas tube, it’s crucial to measure its length accurately to ensure proper fit and functioning. Here are the steps to measure gas tube length:

1. Clear the firearm: Before beginning any measurements, ensure that the firearm is unloaded and there are no live rounds present.

2. Remove the existing gas tube: Carefully disassemble your firearm and remove the gas tube from the gas block.

3. Measure the overall length: Using a tape measure or ruler, measure the gas tube from end to end. This will give you the overall length of the tube.

4. Measure the tube length without the roll pin: If your gas tube has a roll pin, remove it and measure the tube’s length without it. This measurement is important if you’re replacing the gas tube with one that has a roll pin in a different location.

5. Measure the tube length without the gas block: If you plan on replacing the gas block as well, measure the gas tube’s length without it. This will help ensure that the new gas tube and gas block combination will fit properly.

6. Double-check your measurements: It’s always a good idea to measure the gas tube length multiple times to ensure accuracy. Take the average of your measurements to get the most precise result.

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7. Choose the appropriate gas tube: Armed with your accurate measurements, select a gas tube that matches the length you’ve determined. Remember to consider other factors such as material, coating, and manufacturer reputation when making your selection.

FAQs about Measuring Gas Tube Length:

1. Can I use a longer gas tube than the original?
– It is not recommended as it may affect the firearm’s functioning.

2. Is it necessary to measure the gas tube without the gas block?
– It is essential if you plan on replacing the gas block as well.

3. What if my measurements fall between standard sizes?
– It’s best to choose the closest standard size available.

4. Should I account for any bends in the gas tube?
– No, only measure the straight length of the tube.

5. Can I use a shorter gas tube than the original?
– It is not recommended as it may result in unreliable operation.

6. Can I shorten a gas tube to fit?
– It is not recommended as it may affect the gas system’s integrity.

7. Should I measure the gas tube with or without the roll pin?
– Measure it both ways if your new gas tube has a different roll pin location.

By following these steps and considering the FAQs, you’ll be able to accurately measure your gas tube length and make an informed decision when purchasing a replacement.
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