AR-15 Bolt Carrier Group Take Down & How to Clean

This guide details the disassembly and reassembly of an AR-15 bolt carrier group, as demonstrated by John G. Johnson. It covers the removal of key components like the firing pin retainer, firing pin, and cam pin, followed by reassembly. The video emphasizes proper orientation of parts and the function of the gas impingement system.

Quick Summary

To disassemble an AR-15 bolt carrier group, first remove the firing pin retainer pin, then slide out the firing pin. Next, rotate the cam pin to a rectangular position to remove it, allowing the bolt to be separated from the carrier. Reassembly is the reverse process, ensuring correct orientation of all components.

Chapters

  1. 00:00Introduction to BCG Disassembly
  2. 00:58AR-15 Bolt Carrier Group Overview
  3. 01:12Delton Sport AR-15 Features
  4. 02:29Removing the Bolt Carrier Group
  5. 03:42Bolt Carrier Group Components Explained
  6. 04:08Removing the Firing Pin Retainer
  7. 04:41Removing the Firing Pin
  8. 05:00Removing the Cam Pin
  9. 05:17Separating Bolt from Carrier
  10. 05:25Understanding Gas Rings
  11. 05:37Cam Pin Orientation Importance
  12. 05:54Cleaning and Lubrication Tips
  13. 06:01Why Not to Oil the Gas Port
  14. 06:13AR-15 Gas Impingement System Explained
  15. 07:03Reassembling the Bolt Carrier Group
  16. 07:11Reinserting the Bolt Carrier Group Frame
  17. 07:50Reinserting the Firing Pin
  18. 07:57Reinserting the Cam Pin
  19. 08:10Reinstalling BCG into Upper Receiver
  20. 08:41Final BCG Reassembly Steps
  21. 08:48Conclusion and Final Thoughts
  22. 09:12Final Encouragement

Frequently Asked Questions

How do you remove the firing pin from an AR-15 bolt carrier group?

To remove the firing pin from an AR-15 bolt carrier group, first remove the firing pin retainer pin using a tool or the tip of a bullet. Once the retainer pin is out, the firing pin can be slid out from the rear of the bolt carrier.

What is the function of the cam pin in an AR-15 bolt carrier group?

The cam pin is essential for the AR-15's operation. It connects the bolt to the bolt carrier and translates the carrier's linear motion into the bolt's rotational locking and unlocking action within the barrel extension.

Why should you avoid putting oil in the gas port of an AR-15 bolt carrier group?

The AR-15 is a gas impingement system. Putting oil in the gas port or gas tube can cause excess gas to be retained, potentially leading to malfunctions or increased fouling. It's best to keep these areas clean and dry.

How do you reassemble the bolt carrier group after disassembly?

Reassembly involves inserting the bolt into the carrier, reinserting the cam pin (ensuring correct orientation), sliding the firing pin back in, and securing it with the firing pin retainer pin. Then, the entire BCG is reinserted into the upper receiver.

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