Daniel Defense MK18 Black 5.56 NATO 10.3″ Short Barrel Upper Receiver Group 23-004-08013-006



The Daniel Defense MK18 Upper Receiver is a complete upper receiver system ideal for placement on AR pistol lower receivers or AR rifle lower receivers (NFA Short Barreled Rifle Regulations Apply). The upper is built around a carbine-length direct impingement gas system and a 10.3″ barrel chambered for 5.56 NATO. The MK18 Upper features Daniel Defense’s RIS II Rail System with Santoprene heat resistant rail panels.

Components of the Daniel Defense MK18 Upper Receiver

  • Gas System: Low Profile 4140 Steel Gas Block, Carbine-Length, Direct Impingement
  • Barrel: 10.3″ Cold Hammer Forged Chrome Moly Vanadium Steel with 1:7″ Twist
  • Muzzle Device: 17-4 PH Steel Daniel Defense Flash Suppressor with Salt Bath Nitride Finish
  • Bolt Carrier Group: MIL-SPEC M16 Profile Chrome Lined
  • Handguard: 6061-T6 Aluminum Daniel Defense RIS II Rail System with Rail Panels.


  • Item ConditionNew
  • Product TypeReceiver
  • UPC815604014045
  • MPN23-004-08013-006


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