AIM Surplus Black Nitride AR-15 Bolt Carrier Group Review (HD)

Published on January 24, 2014
Duration: 6:44

This review of the AIM Surplus Black Nitride AR-15 Bolt Carrier Group highlights its durability, ease of cleaning, and performance. The reviewer, with extensive experience, details the nitriding process, material specifications (9310 steel bolt, 8620 steel carrier, 4140 steel gas key), and compares it to other finishes like phosphate and nickel boron. It's presented as a cost-effective upgrade for AR-15 owners seeking enhanced wear resistance and corrosion protection.

Quick Summary

The AIM Surplus Black Nitride AR-15 Bolt Carrier Group offers enhanced durability, corrosion resistance, and easier cleaning due to its surface hardening treatment. Made from 9310 steel (bolt) and 8620 steel (carrier), it has shown minimal wear after 700 rounds and provides reliable performance.

Chapters

  1. 00:36Introduction: AIM Surplus Black Nitride BCG
  2. 00:45Ease of Cleaning Comparison
  3. 01:10What is Nitriding? (Melanite, Tenifer)
  4. 01:48Wear Resistance and Corrosion Resistance Benefits
  5. 02:03Wear Analysis After 700 Rounds
  6. 02:33Bolt Specifications (9310 Steel, MPI Treated)
  7. 02:48Extractor Details (O-ring Upgrade)
  8. 03:00Carrier Specifications (8620 Steel, Radius Design)
  9. 03:23Gas Key Specifications (4140 Steel, Grade 8 Fasteners)
  10. 03:39Performance and Reliability
  11. 04:06Overall Impression of Nitride Finishes
  12. 04:41Price and Value ($99)
  13. 04:509310 vs. 158 Steel Bolt Debate
  14. 05:21Conclusion and Final Thoughts

Frequently Asked Questions

What are the benefits of a Black Nitride finish on an AR-15 Bolt Carrier Group?

Black Nitride, also known as Melonite or Tenifer, provides excellent surface hardening, significantly increasing wear resistance and corrosion resistance. It also offers improved lubricity over standard finishes and makes the BCG easier to clean compared to phosphate coatings.

What materials are used in the AIM Surplus Black Nitride AR-15 Bolt Carrier Group?

The bolt is made from 9310 steel, treated and hardened, while the carrier is constructed from 8620 M-spec tool steel. The gas key is machined from 4140 steel and secured with Grade 8 fasteners.

How does the AIM Surplus Black Nitride BCG perform in terms of reliability and wear?

The reviewer reports flawless performance with zero malfunctions across multiple uppers. After 700 rounds, the BCG showed minimal wear, appearing nearly new after cleaning, indicating excellent durability due to the nitride treatment.

Is the AIM Surplus Black Nitride BCG easy to clean?

Yes, the Black Nitride finish makes the BCG easier to clean than standard Parkerized or phosphate finishes. While not as slick as Nickel Boron, it offers a good balance of durability and cleanability.

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