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Are AR10 and AR15 buffer tubes the same diameter?

Are AR10 and AR15 Buffer Tubes the Same Diameter?

When it comes to rifle building and upgrading, a crucial component to consider is the buffer tube. But, are AR10 and AR15 buffer tubes the same diameter? In this article, we’ll delve into the answer to this question and explore the key differences between these two types of buffer tubes.

Are AR10 and AR15 Buffer Tubes the Same Diameter?

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No, they are not the same diameter. AR15 buffer tubes have a standard diameter of 1 1/16 inches (27.94 mm), while AR10 buffer tubes have a diameter of 1 1/8 inches (28.58 mm). This slight difference in diameter may not seem significant, but it’s essential to note for compatibility and interchangeability.

Why the Difference?

The primary reason for the difference in diameter lies in the design and intent of each rifle platform. The AR15 was originally designed as a compact, lightweight rifle for military and law enforcement use, with a focus on mobility and firepower. The buffer tube on an AR15 is optimized for this purpose, allowing for a smaller diameter that enables a more streamlined rifle design.

On the other hand, the AR10 was designed as a heavier, more robust rifle for target shooting and hunting. The larger diameter of the AR10 buffer tube provides additional space for the heavier recoil springs and gas cylinders, which are essential components for the rifle’s overall performance.

Buffer Tube Compatibility

Given the different diameters, buffer tubes are not directly compatible between AR10 and AR15 rifles. You cannot simply swap a buffer tube from an AR15 onto an AR10 or vice versa without risking potential issues or damage to your rifle.

Here are some key points to consider:

  • Using an AR15 buffer tube on an AR10 rifle: You may experience problems with buffer tube clearance, leading to issues with buffer retention and potentially causing the buffer tube to come loose during heavy use.
  • Using an AR10 buffer tube on an AR15 rifle: You may encounter similar issues with buffer tube clearance, as well as potentially causing the AR15 rifle’s recoil spring and guide rod to be misaligned.

Conclusion

In conclusion, AR10 and AR15 buffer tubes are not the same diameter, and compatibility is essential to ensure optimal performance and reliability. While it’s tempting to swap parts between rifles, ignoring the differences in buffer tube diameter can lead to performance issues and potential damage.

Table: Key Differences between AR10 and AR15 Buffer Tubes

AR10 Buffer TubeAR15 Buffer Tube
Diameter1 1/8 inches (28.58 mm)1 1/16 inches (27.94 mm)
Recoil SpringsHeavier, longer recoil springsLighter, shorter recoil springs
Gas CylindersLarger, heavier gas cylindersSmaller, lighter gas cylinders
CompatibilityDesigned for AR10 rifles onlyDesigned for AR15 rifles only

In Summary

When building or upgrading your rifle, it’s essential to choose the correct buffer tube for your platform. AR10 buffer tubes are designed for AR10 rifles, while AR15 buffer tubes are designed for AR15 rifles. Understanding the differences in diameter and design will help ensure you get the best performance from your rifle. Always research and verify compatibility before swapping parts between rifles to avoid potential issues.

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