Answering some questions on the Parker Mountain Machine Walther PDP

Published on April 2, 2025
Duration: 14:15

This video provides an in-depth review of the Parker Mountain Machine (PMM) Walther PDP upper with a dual-port compensator. The speaker, Joel Park, details his extensive experience with the setup, covering reliability with various ammunition types, maintenance practices, and comparisons between polymer and steel-framed Walthers. He also discusses the PMM compensator's attachment method and its implications for cleaning and competition.

Quick Summary

The Parker Mountain Machine Walther PDP upper with a dual-port compensator demonstrates exceptional reliability, with no malfunctions reported over 3,000-4,000 rounds, including with coated bullets. The compensator is permanently attached using thread locker and shims for a robust installation. Minimal lubrication is required, with the pistol performing well even after extended use between maintenance.

Chapters

  1. 00:01Introduction to PMM Walther PDP
  2. 00:10PMM Upper and Dual Port Compensator
  3. 00:20Round Count and Reliability
  4. 00:34Ammunition Types and Coated Bullets
  5. 01:16Lubrication and Maintenance
  6. 02:45Questions on PMM PDP Comp
  7. 02:55Polymer vs. Steel Frame Walthers
  8. 04:31PMM Compensator Attachment Method
  9. 06:06Buying Complete Uppers
  10. 07:31Steel Frame PDP with Dual Port Comp
  11. 08:30PMM vs. Ramjet Compensator
  12. 09:14Round Count for Reliability Assessment
  13. 10:08Ammunition Preferences
  14. 11:03Recoil Spring Choice
  15. 11:43USPSA Legality and Competition
  16. 13:05Final Thoughts on Reliability

Frequently Asked Questions

How reliable is the Parker Mountain Machine Walther PDP upper with a dual-port compensator?

The Parker Mountain Machine Walther PDP upper has proven highly reliable, with the speaker reporting zero malfunctions or stoppages across 3,000 to 4,000 rounds. This includes consistent performance with various ammunition types, such as coated bullets, which can sometimes cause issues in compensated firearms.

What is the attachment method for the PMM dual-port compensator on a Walther PDP?

The PMM dual-port compensator is permanently attached to the barrel using thread locker and shims. This method ensures precise timing and alignment with the slide, creating a robust installation that doesn't require frequent checking or adjustment.

Can you use coated bullets with the PMM Walther PDP compensator?

Yes, coated bullets are confirmed to be safe for use with the PMM Walther PDP compensator. Parker Mountain Machine has stated that many users shoot coated bullets without issues, and the speaker has experienced no problems with them flaking or causing buildup.

How often does the PMM Walther PDP need lubrication?

The PMM Walther PDP requires minimal lubrication. The speaker notes he only lubricated his pistol once before a long trip, performing a quick 30-second wipe-down and reapplication of oil on the frame rails and barrel, indicating excellent performance even with extended periods between maintenance.

Is the PMM Walther PDP setup suitable for USPSA competition?

The PMM Walther PDP setup with the dual-port compensator is not ideal for USPSA competition. The compensator places it in the 'Open Division,' which is highly competitive against specialized 2011s, and there are also scoring considerations for the ammunition used.

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