So Sig Made a PDW | MP320

Published on June 14, 2024
Duration: 12:01

This video reviews the SIG MP320, a compact PDW chassis system. The reviewer notes its limited availability, requiring Sig Elite membership and a small production run. While it offers a decent length of pull and includes a red dot and brace, potential buyers should be aware of its chassis-based design, which can lead to zero shift over time due to wear between plastic and metal components. The included brace is criticized for its poor ergonomics, and the charging handle can cause malfunctions.

Quick Summary

The SIG MP320 is a compact PDW chassis system, noted for its limited availability and design that shrouds a P320 slide. While it offers a decent length of pull and includes accessories, its chassis construction leads to potential zero shift over time due to wear between plastic and metal components, a common issue in such firearms.

Chapters

  1. 00:07Introduction: SIG MP320 PDW
  2. 00:16What is the SIG MP320?
  3. 00:53Why a PDW?
  4. 01:15SIG's Unannounced Product
  5. 01:33Availability and Production Numbers
  6. 02:02Acquiring the MP320
  7. 02:15Initial Impressions and Sig Hate
  8. 02:25PDW Chassis Design Philosophy
  9. 02:41MP320 vs. Other PDWs (TP9, Flux Raider)
  10. 03:04Mechanical Similarities to Flux Raider
  11. 03:35Standard Barrel vs. Proprietary Suppressors
  12. 03:52Suppressor Mounting Limitations
  13. 04:11Top Rail and Folding Brace
  14. 04:30Brace Ergonomics Issues
  15. 05:01Shooting with Brace Collapsed
  16. 05:14Recoil and Charging Handle Issues
  17. 05:35Reliability Testing (600-700 Rounds)
  18. 05:47Value Proposition and Included Accessories
  19. 06:15The Core Problem: Chassis Suck
  20. 06:23Zero Retention in Chassis Systems
  21. 07:48Fundamental Issues with Chassis Systems
  22. 08:54MP320's Zero Retention Performance
  23. 09:00Plastic on Metal Wear
  24. 09:36Observed Zero Shift
  25. 10:20Should You Buy the MP320?
  26. 10:25Hypothetical Gen 2
  27. 10:42Comparison to Existing PDWs
  28. 11:08Niche Appeal and Compromises
  29. 11:21Final Thoughts on the SIG MP320
  30. 11:38Conclusion

Frequently Asked Questions

What is the SIG MP320 and who is it for?

The SIG MP320 is a compact PDW chassis system, considered Sig's first attempt at a concealable, civilian on-body PDW. It's designed for individuals seeking a smaller, more portable firearm than a traditional rifle but with more capability than a handgun, though its limited availability restricts who can purchase it.

What are the main drawbacks of the SIG MP320?

The primary drawbacks include its limited availability, requiring Sig Elite membership and a small production run. Ergonomically, the included folding brace is criticized for its poor design, and the AR-15 style charging handle can cause malfunctions. Crucially, as a chassis system, it is prone to zero shift over time due to wear between its plastic and metal components.

How does the SIG MP320 compare to the Flux Raider and TP9?

The MP320 is similar in overall length to the TP9 and mechanically functions by shrouding a P320 slide, much like the Flux Raider. It offers a standard barrel for suppressor compatibility, unlike some proprietary systems, but shares the chassis-based zero retention concerns common to such designs.

What are the reliability concerns with the SIG MP320?

During testing of 600-700 rounds, the MP320 experienced about four malfunctions. This is considered slightly higher than expected and may be attributed to the firearm being dry or not fully broken in. The AR-15 style charging handle is also noted as a potential source of increased friction and malfunctions.

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