How To Lubricate Your AR 15 BCG For Reliability | @MagicPrepper

Published on April 9, 2025
Duration: 1:00

This video demonstrates proper lubrication techniques for an AR-15 Bolt Carrier Group (BCG) to enhance reliability between cleanings. Key areas to lubricate include the four carrier rails and the bolt collar where it interfaces with the carrier. While grease is used for visual clarity, CLP or other lubricants are suitable depending on environmental conditions.

Quick Summary

Properly lubricate your AR-15 Bolt Carrier Group (BCG) by applying lubricant to the four carrier rails and the bolt collar. This ensures smooth cycling and enhances reliability. Consider climate when choosing between grease, CLP, or other firearm lubricants.

Chapters

  1. 00:00Intro: BCG Lubrication for Reliability
  2. 00:14Lubricating Carrier Rails
  3. 00:35Lubricating the Bolt Collar

Frequently Asked Questions

What are the key areas to lubricate on an AR-15 Bolt Carrier Group (BCG)?

The most critical areas to lubricate on an AR-15 BCG are the four carrier rails where the bolt carrier slides within the upper receiver, and the bolt collar where the bolt itself interfaces with the carrier.

Does the type of lubricant matter for an AR-15 BCG?

While grease is shown for visual clarity, CLP or other firearm-specific lubricants are acceptable. The best choice can depend on your climate; some lubricants perform better in extreme heat or cold.

Why is lubricating the AR-15 BCG important?

Proper lubrication of the AR-15 BCG is essential for ensuring reliable function, reducing friction during cycling, and preventing malfunctions, especially between deep cleanings.

What does 'MPI' mean on an AR-15 Bolt Carrier Group?

'MPI' stands for Magnetic Particle Inspected. This is a quality control process used to detect surface and near-surface flaws in critical metal components like bolt carrier groups.

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