Maxim Defense PDX: It's a pint sized 300BLK!

Published on April 27, 2021
Duration: 16:29

This guide details the field stripping process for the Maxim Defense PDX, highlighting its unique internal mechanics. The video demonstrates how to disassemble the rifle, emphasizing the truncated bolt carrier group and integrated buffer system, which differ from a standard AR-15. This procedure is crucial for maintenance and understanding the platform's specialized design.

Quick Summary

The Maxim Defense PDX is a compact SBR chambered in .300 Blackout, designed for tier-one military units. It features a proprietary 'Hatebrake' muzzle device for flash suppression and gas boosting, a truncated bolt carrier group, and an integrated short buffer system. While reliable with subsonic ammunition and suppressors, supersonic loads may cause malfunctions.

Chapters

  1. 00:00Introduction to the Maxim Defense PDX
  2. 01:28Development and Competition
  3. 03:08External Features and Controls
  4. 05:03Receiver and Handguard Specs
  5. 06:20The Hatebrake Muzzle Device
  6. 08:12Field Stripping and Internal Mechanics
  7. 11:12Suppressed Performance Testing
  8. 13:53Caliber Options and Pricing

Frequently Asked Questions

What caliber is the Maxim Defense PDX primarily chambered in for this review?

This review focuses on the Maxim Defense PDX chambered in .300 Blackout. The firearm is also available in 7.62x39mm and 5.56x45mm NATO calibers.

What is the function of the Maxim Defense PDX's 'Hatebrake' muzzle device?

The proprietary 'Hatebrake' muzzle device on the PDX acts as a flash suppressor, a gas booster to ensure reliability with the short barrel, and a sound moderator that directs concussive force downrange.

How does the Maxim Defense PDX's internal mechanism differ from a standard AR-15?

The PDX features a unique, truncated bolt carrier group and an integrated, ultra-short buffer system, meaning it does not 'clamshell' like a standard AR-15 during disassembly due to its compact design.

What were the reliability findings when testing the PDX with a suppressor?

When tested with an OSS suppressor, the PDX experienced reliability issues (stovepipes) with supersonic .300 Blackout ammunition but performed consistently with subsonic loads, its intended use case.

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