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Maxim Defense MDX 510 300BLK AR-15 Pistol - 10.3" Urban

AR Pistol

In stock
Only 1 left

FFL Required Before Shipping.

Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.


Comfort and compactness, the 10.3” barrel length of the MDX-510 has always been a staple for CQB firearms. The MDX series was designed and tested to handle the fierce demands of the Tier 1 community. The right upgrades, features, and technology make sure the MDX-510 will stand up to whatever you put it through.

Each MDX-510 is supplied with a Gen 6 CQB brace. The CQB system combines form and function flawlessly. Adding just 5.3” to the receiver when fully compact, yet extending fully to 10”, you get a compact package with the full length-of-pull of standard carbine stocks.

Our MDX series firearms are also equipped with the Maxim’s HATEBRAKE muzzle booster. This patent-pending device significantly reduces recoil, decreases the flash signature, pushes gasses and concussion waves downrange away from the operator, and improves overall performance in short-barrel pistols and rifles.


  • CQB brace
  • Radian Raptor charging handle
  • Ambidextrous QD sling mounts
  • Armorer level adjustable gas block
  • Ambidextrous rear QD sling mount
  • Radian Talon ambidextrous selector
  • BCM Gunfighter grip
  • ALG Defense Combat Trigger
  • Maxim Defense 7075 billet receiver set
  • M-RAX and M-SLOT compatible handguard
  • HATEBRAKE Muzzle Booster
  • 300BLK caliber
More Information
SKU MXM-48119
Product Type AR Pistol
Manufacturer Maxim Defense
Color Urban Grey
Barrel Length 10.3"
Caliber 300 Blackout

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