Sharp's Extreme Bolt Carrier Group

Published on August 12, 2018
Duration: 8:56

This review of the Sharps Rifle Company Extreme Bolt Carrier Group (BCG) highlights its construction from S7 tool steel with a proprietary heat treatment and Diamond-Like Carbon (DLC) coating. After approximately 1000 rounds with zero lubrication, the BCG showed minimal wear and no malfunctions, demonstrating impressive durability and ease of cleaning. While the DLC coating showed some wear on lug surfaces, the overall performance and balanced recoil impulse suggest it's a significant upgrade for those seeking maximum reliability in their AR-15 builds.

Quick Summary

The Sharps Rifle Company Extreme Bolt Carrier Group is made from S7 tool steel with a proprietary heat treatment and a Diamond-Like Carbon (DLC) coating. Tested for 1000 rounds without lubrication, it showed minimal wear, easy cleaning, and zero malfunctions, indicating high reliability and durability.

Chapters

  1. 00:01Introduction to Sharps BCG
  2. 00:33BCG Hype and Materials
  3. 00:49S7 Tool Steel Properties
  4. 01:09DLC Coating Explained
  5. 01:44No Lubrication Test
  6. 02:02Post-1000 Round Cleaning
  7. 02:21Performance Testing (Accuracy, Cyclic Rate)
  8. 02:48Reliability and Wear Observations
  9. 03:23Firing Impulse Change
  10. 03:40Bolt Lug Design Comparison
  11. 04:03Sharps Bolt Lug Modification
  12. 04:37Carrier Weight Reduction
  13. 04:48Slab Side vs. Round Carrier
  14. 05:01Underside Relief Cuts
  15. 05:07Tail and Back End Modifications
  16. 05:19Smoother Cycling
  17. 05:23Reduced Reciprocating Mass
  18. 05:45Recoil Impulse Balance
  19. 06:02Weight Balancing
  20. 06:09Slow Motion Cycling
  21. 06:19Summary of Testing
  22. 06:38Is it Worth Upgrading?
  23. 06:51Recommendation for Builds
  24. 07:13Zero Lubrication Advantage
  25. 07:23DLC vs. Nitride
  26. 07:51Observed DLC Wear
  27. 08:08Lifetime Warranty
  28. 08:16Overall Impression
  29. 08:30Viewer Experience Request

Frequently Asked Questions

What material is the Sharps Extreme Bolt Carrier Group made from?

The Sharps Extreme Bolt Carrier Group is constructed from S7 tool steel. This material offers higher tensile and yield strength than standard Carpenter steel, resulting in a harder and more durable bolt.

What is the benefit of the DLC coating on the Sharps BCG?

The Diamond-Like Carbon (DLC) coating on the Sharps BCG is known for its extreme hardness and low-friction properties. It's designed to resist wear, prevent marring, and potentially eliminate the need for lubrication, making cleaning easier.

How did the Sharps BCG perform after 1000 rounds without lubrication?

After approximately 1000 rounds with absolutely no lubrication, the Sharps BCG showed minimal carbon buildup that wiped off easily. It also experienced zero malfunctions and exhibited no significant wear on its bearing surfaces, demonstrating impressive reliability.

What design modifications does the Sharps BCG have for reliability?

The Sharps BCG features a modified bolt lug design with a 'camphor' or cut to enhance reliability. This modification allows for more glide within the chamber, particularly beneficial when conditions are not perfectly clean or aligned.

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