How to Lubricate / Oil the Sig Sauer MCX Rattler LT Upper Receiver

Published on January 23, 2025
Duration: 8:20

This guide details the proper lubrication of the Sig Sauer MCX Rattler LT upper receiver. It emphasizes ensuring the firearm is unloaded, disassembling the upper receiver, and applying lubricant to critical internal components like the charging handle channel, bolt carrier group, and bolt spring. The process aims to prevent metal-on-metal grinding and ensure smooth operation.

Quick Summary

Properly lubricating your Sig Sauer MCX Rattler LT upper receiver involves ensuring it's unloaded, disassembling it to access internal channels, applying lubricant to the bolt carrier, charging handle, and spring, then reassembling and cycling the action. This prevents wear and ensures smooth operation.

Chapters

  1. 00:00Introduction and Safety Check
  2. 00:25Disassembling the Upper Receiver
  3. 01:07Lubricating the Upper Receiver Channel
  4. 01:42Lubricant Options
  5. 02:34Using Q-tips for Application
  6. 03:16Lubricating the Spring Area
  7. 04:33Lubricating the Charging Handle
  8. 05:06Reinstalling Charging Handle
  9. 05:31Lubricating the Bolt Carrier Group
  10. 06:20Lubricating the Bolt Spring
  11. 06:50Reassembling the Upper Receiver
  12. 07:11Attaching Upper to Lower Receiver
  13. 07:44Final Cycling and Testing

Frequently Asked Questions

What are the key steps to lubricate a Sig Sauer MCX Rattler LT upper receiver?

Begin by ensuring the firearm is unloaded. Disassemble the upper receiver, remove the bolt carrier group and charging handle assembly. Apply lubricant to the internal channels, bolt carrier, charging handle, and spring. Reassemble and cycle the action to distribute the lubricant.

What tools are recommended for lubricating the Sig Sauer MCX Rattler LT upper receiver?

Essential tools include your chosen firearm lubricant, long Q-tips for reaching internal areas, and a flashlight to inspect coverage. Some lubricants with needle applicators can also be very helpful for precise application.

Why is it important to lubricate the Sig Sauer MCX Rattler LT upper receiver?

Lubrication prevents metal-on-metal contact, reducing wear and tear on critical components. This ensures smoother operation, enhances reliability, and contributes to the overall longevity of the firearm, especially when it's new.

How does lubricating the MCX Rattler LT upper receiver differ from a standard AR-15?

While the general principles are similar, the MCX Rattler LT's upper receiver has specific internal geometries, particularly around the charging handle channel and bolt spring housing, that require focused attention during lubrication to ensure optimal function.

More Training & Techniques Videos You Might Like

More from Gear And Guns

View all →