Daniel Defense 10.3″ 5.56 MK18 AR-15 Complete Upper – Flat Dark Earth


  • Reliable carbine length gas system.
  • Chrome lined 41V50 chrome moly vanadium steel barrel with manganese phosphate finish.
  • M16 cut MIL-SPEC bolt carrier group with properly staked gas key and chrome lined bore.
  • 9.55″ MK18 Rail Interface System (RIS) II provides plenty of accessory space and includes 3 rail covers.
  • Effective flash suppressor helps tame flash from the short barrel.
  • Hand assembled, quality checked, and test fired before leaving the Daniel Defense facility.


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SKU23-004-08013-011 Category

Please Note: This upper assembly has a barrel less than 16” in length. These uppers are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law.

The Daniel Defense 10.3″ MK18 Complete Upper is the perfect option for anyone looking for a high-quality, reliable upper for their AR-15. This complete upper is the same one used on their MK18 short barreled rifle and MK18 pistol, so you know you’re getting a top-notch product. The cold hammer forged barrel and RIS II handguards are both produced in-house, ensuring that you’re getting the best possible components. The M16 bolt carrier group is also better than MIL-SPEC, making this one of the best uppers available on the market today.


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