Quick Tip: The Difference Between Nitrided & Chrome-Lined Barrels

Published on October 29, 2019
Duration: 1:55

This guide, drawing from expert instruction by Caleb at Brownells, details the key differences between nitrided and chrome-lined AR-15 barrels. It explains how nitriding modifies the metal surface for potential accuracy benefits and overall protection, while chrome lining excels in heat and friction resistance for demanding applications. The choice depends on the intended use, with nitriding often favored for commercial builds and chrome lining for military or full-auto scenarios.

Quick Summary

Nitrided barrels modify the metal's surface for potential accuracy gains and offer full-surface corrosion resistance, making them ideal for many commercial builds. Chrome-lined barrels excel in high heat and friction resistance, making them the choice for full-auto or military applications. Terms like Melonite and QPQ are synonyms for nitriding.

Chapters

  1. 00:00Introduction: Nitrided vs. Chrome-Lined Barrels
  2. 00:16Accuracy Comparison
  3. 00:29Chrome-Lined Barrel Benefits
  4. 00:44Nitrided Barrel Benefits
  5. 01:03Corrosion Resistance Comparison
  6. 01:16Terminology and Conclusion

Frequently Asked Questions

What is the main difference in accuracy between nitrided and chrome-lined barrels?

Nitriding alters the barrel's metal surface, potentially offering more consistent accuracy. Chrome lining adds a layer to the bore, which can sometimes affect consistency, though it excels in durability under extreme conditions.

Which barrel type is better for full-auto fire or military use?

Chrome-lined barrels are generally preferred for full-auto fire and military applications. The chrome plating provides superior resistance to the high heat and friction generated during sustained firing.

Are Melonite and QPQ the same as nitriding?

Yes, terms like Melonite and QPQ are industry synonyms for the nitriding process. They refer to different variations or branding of the same core surface treatment technology.

Which barrel finish offers better corrosion resistance?

While both offer good corrosion resistance, nitriding typically has an edge because the entire barrel surface is treated, providing more comprehensive protection than chrome lining, which usually only covers the bore and chamber.

More Gunsmithing & DIY Videos You Might Like

More from Brownells, Inc.

View all →