(1 customer review)


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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. 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 stock
  • 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

Technical Specification

7.62x39 | 5.56 NATO | 300 BLK
23.5” - 25” (collapsed)
Gen7 CQB

1 review for MDX:510

  1. reza

    I bought a 510C in 5.56 – Extremely well built gun which runs flawlessly. The choice of components is close to perfect and the hatebrake is very effective – no complaints from colleagues closeby…. Also a beauty to look at! I will very likely purchase additional caliber uppers soon. The only complaint I could have is that clearly a lot of thought went into this gun – I wish I had a user manual or other document which explained some of the thought process behind it, some of the specs / recommendations, adjustment recommendations / service requirements on the gas block, etc.
    A high quality weapon built for hard use!

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