Daniel Defense 10.3" 5.56 MK18 Complete Upper - Flat Dark Earth

Manufactured by Daniel Defense
SKU: 23-004-08013-011
MPN: 23-004-08013-011
Manufactured by Daniel Defense
1 Review

Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



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 same complete upper receiver assembly used on their MK18 short barreled rifle and MK18 pistol. Using top quality components from their entirely in-house produced cold hammer forged barrels, legendary RIS II handguards, better than MIL-SPEC M16 bolt carrier groups means that you're getting one of the best uppers available for the AR-15.

  • 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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AssemblyComplete Assemblies
Barrel ContourGovernment
Barrel Length10.3
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandDaniel Defense
Caliber Gauge5.56 NATO
Gas System LengthCarbine
Gas System TypeDirect Impingement
Handguard9.55 in Daniel Defense MK18 RIS II
Muzzle DeviceDaniel Defense Flash Suppresor
Twist Rate1:7
Weight3.5 lbs

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

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Revived this upper a few days ago.... And I apsolutly love it!!! Everything went smooth from the transaction to the shipping!! Great company and I'll definitely be ordering from here again!!!