Masterpiece Arms DS9 Open

Published on January 12, 2025
Duration: 19:18

This video details a troubleshooting journey with a MasterPiece Arms MPA DS9 Open pistol, highlighting issues stemming from an incompatible guide rod and shock buff that caused binding. The presenter, an experienced shooter, experienced significant malfunctions during competitive matches, leading to a deep dive into the firearm's internal mechanics. The video emphasizes the importance of proper component compatibility and thorough break-in periods for high-performance race guns.

Quick Summary

The MasterPiece Arms MPA DS9 Open is a 9mm competition pistol for USPSA Open Division, featuring a large compensator, aggressive steel grip, and a precise trigger. A key malfunction involved guide rod binding due to an incompatible guide rod and shock buff, preventing the slide from cycling. This highlights the need for thorough break-in periods and component compatibility in high-performance firearms.

Chapters

  1. 00:00Introduction: Heartbreak and the MPA DS9 Open
  2. 00:12Understanding Generational Updates and Tolerance Stacking
  3. 00:50MasterPiece Arms MPA DS9 Open: Specs and Intent
  4. 01:22The Appeal of Open Guns in Competition
  5. 02:07Initial Impressions: Balance, Weight, and Grip
  6. 02:42Grip Texture and Thumb Rest
  7. 03:08Safety Features and Recoil Spring
  8. 03:18Compensator Design: Ports and Popple Holes
  9. 03:47The MPA DS9 Open Trigger: Precision and Feel
  10. 04:31Machined vs. Stamped Trigger Bows
  11. 04:58Titanium Components and Reduced Lock Time
  12. 05:51MPA Grip's Magazine Insertion Correction
  13. 06:11Drawbacks: Gas Scheme and Velocity Spread
  14. 07:40Ammunition Load Requirements for Open Guns
  15. 07:56Initial Reliability and Match Preparation
  16. 08:36First Major Malfunction at Area 4
  17. 09:02The Malfunction: Slide Locked Open
  18. 10:05Contacting MPA: Identifying the Guide Rod Issue
  19. 10:22Deformed Guide Rod Analysis
  20. 10:43Customer Service: Overnighted Replacement Guide Rod
  21. 10:56Pre-Nationals Practice: A Weird Lock Open
  22. 11:24Nationals: The Second Major Malfunction
  23. 12:11Andrew Haider's Assistance: Shock Buff Interference
  24. 12:25Aluminum Shock Buff and Guide Rod Binding
  25. 13:01Temporary Fix: New Guide Rod and Spring
  26. 13:21Day Two: Ejection Problems and Extractor Tension
  27. 13:37Day Three: Third Binding Incident
  28. 14:02Miserable Match Experience and Penalties
  29. 14:32Strange Reliability Shift After 2,200 Rounds
  30. 14:54Incompatible Guide Rods and Frame Issues
  31. 15:04Returning the Gun to MPA for Repair
  32. 15:35MPA's Factory Tuning and Excellent Service
  33. 15:46Prevalence of Issues: Viewer Input Requested
  34. 16:22Comparison with Older and Newer MPA DS9 Models
  35. 16:54Current Reliability Post-Repair
  36. 17:08Love for the Gun's Shooting Dynamics
  37. 17:22Race Cars of Performance: Flirting with Disaster
  38. 17:30Round Count and Overall Performance
  39. 17:44Trust and Break-in Period for Major Matches
  40. 18:28MasterPiece Arms' Quality and Other Models
  41. 18:44Future Updates and Channel Subscription
  42. 19:11Alternative Open Gun: Bull Armory Spitfire

Frequently Asked Questions

What are the primary features of the MasterPiece Arms MPA DS9 Open pistol for competition?

The MPA DS9 Open is designed for USPSA Open Division and features a large compensator with multiple ports and popple holes, a steel grip with aggressive texturing for traction, a mounted optic, and a highly refined trigger with minimal take-up and overtravel, aiming for peak performance.

What caused the MasterPiece Arms MPA DS9 Open to malfunction during competition?

The primary malfunction was traced to an incompatible guide rod and a finned aluminum shock buff. This combination caused the guide rod to bind against the compensator, preventing the slide from cycling properly, leading to unexpected lock-opens.

How does the MPA DS9 Open's trigger differ from standard 2011 triggers?

Unlike typical 2011 triggers with stamped bows that can flex, the MPA DS9 Open uses a machined trigger bow for a more direct, non-deflecting pull. This, combined with titanium internal components, aims to reduce lock time and improve shot control.

What is the recommended break-in period for a high-performance competition pistol like the MPA DS9 Open?

The presenter suggests a break-in period of 1,500 to 2,000 rounds is necessary to prove a competition firearm's reliability before bringing it to a major match, learning this lesson the hard way through significant malfunctions.

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