Forward Control Designs (SBCG) BCG Physical

Published on February 24, 2020
Duration: 15:27

This comprehensive physical inspection of the Forward Control Designs (SBCG) Bolt Carrier Group highlights its robust construction and attention to detail. The review covers critical checks including gas ring tension, firing pin protrusion, extractor function, bolt tail and carrier bore gauging, and headspace. The use of Aux Ox carrier key screws and Psionics staking method are noted for their security. A borescope examination reveals a very smooth internal finish, particularly in the gas ring and bolt tail runs, indicating high manufacturing quality. The reviewer concludes with a highly positive assessment, noting the BCG passed all checks with flying colors.

Quick Summary

The Forward Control Designs (SBCG) Bolt Carrier Group features MP3 coating, Aux Ox carrier key screws with Psionics staking for security, and a SOTAR Cam Pin with a dimple. The extractor is intentionally uncoated for better grip. Gauging and borescope inspection reveal a very tight fit and extremely smooth internal finish, indicating high gas efficiency and manufacturing quality.

Chapters

  1. 00:00Introduction to FCD SBCG BCG
  2. 00:47Gas Ring Inspection
  3. 00:55Firing Pin Retaining Pin & Firing Pin
  4. 01:04SOTAR Cam Pin
  5. 01:29Extractor Inspection
  6. 01:44Extractor Spring and Insert
  7. 01:55Extractor Movement Check
  8. 02:03Extractor Gauging
  9. 02:19Cam Pin Wear and Fit
  10. 02:36Firing Pin Movement in Bolt
  11. 02:45Firing Pin Protrusion Measurement
  12. 03:13Firing Pin Free Movement
  13. 03:21Bolt Tail Gauging
  14. 03:33Firing Pin Hole Gauging
  15. 04:20Magnetism Check
  16. 04:39Ejector Inspection
  17. 05:17Headspace Check
  18. 06:24Carrier Inspection
  19. 07:03Gas Key Straightness
  20. 07:21Gas Key Gauging
  21. 07:38Carrier Key Screw Security Test
  22. 10:16Carrier 3-Bore Gauging
  23. 11:53Borescope Inspection
  24. 14:34Final Assessment & Conclusion

Frequently Asked Questions

What are the key features of the Forward Control Designs SBCG Bolt Carrier Group?

The FCD SBCG BCG features MP3 coating, Aux Ox carrier key screws with Psionics staking for enhanced security, and a SOTAR Cam Pin with a dimple for consistent orientation. The extractor is intentionally not coated for better grip, and it utilizes a five-coil spring with a black insert.

How is the gas efficiency of the FCD SBCG Bolt Carrier Group assessed?

Gas efficiency is evaluated by gauging the carrier's 3-bore. The SBCG BCG performed exceptionally well, with the first and second green gauges passing for the support and gas ring runs, and the second green gauge passing for the bolt tail run, indicating a very tight fit and high gas efficiency.

What did the borescope inspection reveal about the FCD SBCG Bolt Carrier Group's internal finish?

The borescope inspection showed an extremely smooth finish in critical areas like the cam pin recess, gas ring run, and bolt tail run. Visible components included exhaust ports, the gas port, and threaded bores for the gas key screws, all contributing to a high-quality internal finish.

What is the significance of the extractor not being MP3 coated on this BCG?

The extractor not being MP3 coated is a deliberate design choice that makes it less slick. This improved grip on the casing is beneficial for reliable extraction, preventing slippage and ensuring consistent ejection of spent casings.

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