Maxim Defense PDX Pistol 300BLK | 5.5in | MXM-47822

The Maxim Defense PDX is a compact AR-style pistol chambered in .300 AAC Blackout with a 5.5-inch barrel and a 20-round capacity. Designed around Maxim’s SCW pistol brace system and an integrated, interchangeable-buffer BCG, the PDX emphasizes a reduced overall length and enhanced follow-up control for close-quarters work. It ships with the HATEBRAKE muzzle booster installed under the handguard and a hard-anodized finish on its mix of titanium, stainless, and aluminum components. For an optic pairing under $1,000, a rugged micro red-dot such as the Holosun 507C series complements the PDX’s sight radius and compact profile.

Common applications for this configuration include confined-space or urban operations and focused range or training sessions where a short-barrel PDW platform is preferred.

Product Specifications

• The caliber is .300 AAC Blackout.
• The barrel length is 5.5 inches.
• The thread pitch is 5/8×24.
• The magazine capacity is 20 rounds.
• The action is Semi-Auto.
• The overall length is 18.75 inches.
• The included muzzle device is the HATEBRAKE muzzle booster (installed under the handguard).
• The stock/brace system is the Maxim SCW 4-inch pistol brace with integrated BCG and interchangeable buffer weights.
• The materials include 6Al-4V titanium, 17-4 stainless steel, 7075 and 6061 aluminum.
• The finish is hard anodizing.
• The handguard is a two-piece M-LOK design.
• The safety is a manual safety.
• The product type is listed as AR pistol.
• The manufacturer’s part number is MXM-47822.
• The UPC is 680017478223.
• The listed weight is inconsistent in source data; see notes.

The PDX combines a short overall length and an integrated SCW brace system to deliver a compact, controllable shooting platform. Its materials and hard-anodized finish are selected to balance corrosion resistance and weight, while the HATEBRAKE mounted beneath the handguard moderates rearward impulse and redirects signature forward for suppressed and unsuppressed use. The two-piece M-LOK handguard supports accessory mounting without extending overall length excessively.

This model is suited to shooters who need a truly compact AR-pattern pistol that retains full-size ergonomics and a 20-round magazine. Its configuration is practical for confined-environment training and operational drills where a short PDW footprint is required, yet it retains the accessory compatibility to adapt for optics and mounting preferences.

Voted BEST OF SHOT 2019 by RECOIL Magazine.

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