*Estimated Shipping: Fourth Quarter 2020*
**PLEASE READ FOR PURCHASES: You will not be charged until this pre-order item ships. When placing your order for this pre-order item do not have anything else in your cart. If you wish to purchase in-stock items as well, please do separate transactions. Any orders received with pre-order items AND normal stocking items will be canceled and refunded. We are sorry for the inconvenience. 

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 7 CQB stock or 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.



  1. SCW or CQB pistol brace or stock
  2. Radian Raptor charging handle
  3. Ambidextrous QD sling mounts
  4. Armorer level adjustable gas block
  5. Ambidextrous rear QD sling mount
  6. Radian Talon ambidextrous selector
  7. BCM Gunfighter grip
  8. ALG Defense Combat Trigger
  9. Maxim Defense 7075 billet receiver set
  10. M-RAX and M-SLOT compatible handguard
  11. HATEBRAKE Muzzle Booster



• Calibers: 7.62×39 | 5.56 NATO | 300 BLK
• Barrel length: 10.3”
• Overall length: 23.5” – 25” (collapsed)
• Configurations: SCW Pistol | SCW SBR | CQB Pistol | CQB SBR

IMPORTANT INFORMATION REGARDING SILENCERS (cans, suppressors, etc.) on any Maxim Defense firearm: CLICK HERE

Puerto Rico Customers: Consumers must go through your local PR dealer. Dealers must buy through Distribution. effective 10/03/2019


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