Disassembling And Reassembling Sig Mpx k 9mm!!💥

Published on February 21, 2024
Duration: 10:24

This guide details the disassembly and reassembly of the Sig MPX-K 9mm, with a specific focus on accessing and maintaining the piston system. The process involves removing takedown pins, separating receivers, and then removing the barrel to access the piston. The presenter emphasizes the importance of lubrication with products like Slip 2000 for optimal performance and longevity, especially for piston-driven firearms.

Quick Summary

Disassembling the Sig MPX-K piston system involves removing the barrel, then unlocking the piston with a 180-degree rotation using a metal pick. A plastic punch is used to remove the piston. Lubrication with products like Slip 2000 is crucial for performance and longevity, especially as piston systems keep the firearm cleaner.

Chapters

  1. 00:19Introduction to Sig MPX-K
  2. 00:27Firearm Unloaded Check
  3. 00:34Purpose: Piston System Access
  4. 00:42Firearm Features Overview
  5. 01:05Aftermarket Additions
  6. 01:14Folding Pistol Brace
  7. 01:28Disassembly Start
  8. 01:33Removing Takedown Pins
  9. 01:51Separating Receivers
  10. 01:56Removing Handguard (Optional)
  11. 02:18Removing Barrel Assembly
  12. 02:39Removing Bolt Carrier Group
  13. 02:46Bolt Carrier Group Removed
  14. 02:53Barrel Assembly Removed
  15. 03:07Accessing Piston System
  16. 03:10Unlocking Piston
  17. 03:21Removing Piston Assembly
  18. 03:32Piston Assembly Out
  19. 03:35Lubricating Piston
  20. 03:53Reinstalling Piston
  21. 04:16Locking Piston
  22. 04:36Reinstalling Barrel
  23. 04:43Reinstalling Handguard Screws
  24. 05:00Shooting Impressions
  25. 05:12Maintenance Drawbacks
  26. 05:31Reassembly - Handguard
  27. 05:52Reassembly - Bolt Carrier Group
  28. 06:03Bolt Carrier Group Disassembly/Reassembly
  29. 07:08Lubricating Bolt Carrier Group
  30. 07:35Reinstalling Bolt Carrier Group
  31. 08:02Reinstalling Charging Handle
  32. 08:14Reassembling Upper to Lower
  33. 09:03Reassembly Challenges
  34. 09:31Final Receiver Lock-up
  35. 09:51Timney Trigger Performance
  36. 10:03Firing Test
  37. 10:07Final Wipe Down
  38. 10:15Conclusion

Frequently Asked Questions

How do you disassemble the piston system on a Sig MPX-K?

To disassemble the piston system on a Sig MPX-K, first remove the upper receiver from the lower. Then, remove the barrel assembly. At the front of the barrel, insert a metal pick into the designated slot and rotate 180 degrees to unlock the piston, then push it out with a plastic punch.

What lubricant is recommended for the Sig MPX-K piston system?

The presenter recommends using Slip 2000 lubricant for the Sig MPX-K's piston system and bolt carrier group. This lubricant is noted for its effectiveness in a wide range of temperatures, from cold to hot.

What are the benefits of a piston-driven system like the one in the Sig MPX-K?

A key benefit of the piston-driven system in the Sig MPX-K is that it expels gases forward, away from the shooter and the action. This results in a cleaner firearm, especially when shooting suppressed, requiring less frequent cleaning.

How difficult is it to reassemble the Sig MPX-K bolt carrier group?

Reassembling the Sig MPX-K bolt carrier group is described as being very similar to an AR-15. The firing pin and spring are easily removed and reinserted. The presenter notes that seating the firing pin can sometimes require a plastic tool to push down on the pin.

More Gunsmithing & DIY Videos You Might Like

More from Mr. Madness

View all →