Daniel Defense MK12 SPR Black 5.56 NATO 18″ Upper Receiver Group 23-142-10035



Daniel Defense’s MK12 Upper Receiver Group for AR15s is built around a cold hammer forged, stainless steel barrel. The chamber to this upper receiver is created during the cold hammer forging process, ensuring the most precise alignment of the chamber to the bore possible. This upper receiver group features a rifle length direct impingement gas system and employs an MK12 gas block that’s built to USSOCOM specifications. Other features include a full length flattop picatinny rail with plenty of space to mount a optic of choice, as well as clip-on night vision devices, as well as picatinny rails in the 9 o’clock, 6 o’clock, and 3 o’clock positions for the installation of tactical lights, lasers, fore-grips and other accessories. In addition, the MK12 Upper Receiver Group is outfitted with a Daniel Defense Improved Flash Suppressor, and an ambidextrous GRIP-N-RIP charging handle.

Features of the MK12 Upper Receiver Group:

  • Cold hammer forged, stainless steel barrel
  • Rifle length direct impingement gas system
  • Quad-rail system
  • Daniel Defense Improved Flash Suppressor
  • Ambidextrous GRIP-N-RIP charging handle


  • Item ConditionNew
  • Product TypeReceiver
  • UPC815604016735
  • MPN23-142-10035


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.