Maxim Defense PDX 300 Blackout Pistol - FDE - 5.5"

Manufactured by Maxim Defense
SKU: MXM-47822
MPN: MXM-47822
Manufactured by Maxim Defense
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Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.

Handguns are regulated by the ATF have restrictions and requirements:
 •Your Entire Order will ship only to a Federal Firearm License holder
•Current Processing Time can be 14 to 16 days 
•Carriers and shipping methods are limited
•A copy of your order/invoice as well as the current FFL License for your local dealer must be emailed to ffl@primaryarms.



The Maxim Defense PDX 300 Blackout AR Pistol, originally designed for the SOCOM PDW Solicitation as an SBR, is now available for purchase in a pistol form. The PDX .300 BLK features a 5.5” barrel while still being a traditional AR style gas system and retaining all the reliability. The Maxim Hatebrake muzzle brake directs gas and concussion down range away from the shooter and decreases the flash signature making it more bearable for the user when used in close quarters. However, what sets this 300 Blackout pistol apart from the rest is the patent pending SCW brace system and buffer that is much shorter than a traditional AR set up making this gun extremely compact when fully collapsed. The full length of the buffer system is only 4” long and the buffer itself comes with interchangeable weights, so you can fine tune depending on the ammo or if you are running suppressed. If you are looking to change up your collection, check out the Maxim Defense .300 Blackout PDX AR-15 Pistol.

  • 5.5” barrel chambered in 300 Blackout
  • Maxim Hatebrake muzzle brake
  • Maxim SCW pistol brace
  • Adjustable buffer weight
  • Flat dark earth anodized
  • M-LOK free float handguard with hand stop
  • Billet machined receivers
  • Ambidextrous safety and charging handle
  • ALG Combat Trigger
  • Weight: 5 lbs 11 oz.

The upper and lower receivers are machined from billet aluminum and hardcoat anodized FDE and the lower features an ambidextrous safety selector. Additionally, it comes with an ALG Defense Combat Trigger and ambidextrous charging handle. The free float handguard features M-LOK attachment slots and QD sling swivel slots as well as a hand stop.
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Barrel Coating
Barrel Length5.5
BrandMaxim Defense
Caliber Gauge300 Blackout
Muzzle DeviceMaxim Defense Hatebrake
Weight5 lbs. 11 oz.

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