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Questions & Answers
Is the flash-hider pinned and welded? Expert Answer

GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement

by Brandon B, Gear Expert, July 28, 2021
What length handguard is the rail? Expert Answer

The Daniel Defense MK18, URG, 10.3in 5.56 Complete Upper Receiver features the NK18 Rail Interface System II, RIS II, which measures 9.55" in length.

by Ethan, Gear Expert, February 27, 2023
Customer Reviews
Helpful Positive Review
Duty build by David, April 23, 2020
I bought this upper for HRCC. My training and everything so far with this rifle have been flawless. Easy use for entry drills and CQB. Very accurate, even under ridiculously heavy use. Runs great with my Surefire SOCOM RC scilencer on it, spits a lit...
Read More...
8/8 found this helpful
Helpful Positive Review
Top Shelf Upper by TPhips, Verified Owner, May 29, 2021
I already had a MK18 but decided to go ahead and get another upper for a future build. Like the other reviewer, it originally stated like a 8-10 month backorder but I wasn’t in a rush and figured I had time to cancel my order if I changed my mind. Th...
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3/3 found this helpful
Helpful Positive Review
Whhoooaaa! by Dan Larson, Verified Owner, August 17, 2024
I've wanted one for years and I'm not disappointed. You can build really nice stuff but believe me there is a difference when you buy a quality pre-made item like this.
1/1 found this helpful
Helpful Positive Review
Such an amazing upper! by Mo Guns, Verified Owner, May 12, 2021
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DD MK18 upper by Keith, Verified Owner, October 19, 2024
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Totally Worth It by Honeybadger, Verified Owner, May 3, 2021
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Product Info for Daniel Defense MK18, URG, 10.3in 5.56 Complete Upper Receiver w/ Flash Hider

Daniel Defense manufactures the highest quality complete AR15 upper receivers on the market today! Every Daniel Defense upper is painstakingly hand assembled, quality assurance tested, and test fired to ensure that the highest quality product makes it to the hands of our customers. The Daniel Defense M4 URG, MK18 comes complete with bolt carrier group and charging handle, 10.3? Cold Hammer Forged Barrel, RIS II MK18 Rail System in Black or Flat Dark Earth, and Daniel Defense low profile gas block.MK18, URG, 10.3" 5.56, 1:7 Twist, GOV, LPG, RIS II Rail, DDFS-Black.image

Upper receiver is Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized. Barrel is Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 twist, 10.3? Government Profile, Chrome Lined, MP tested, and Mil-Spec Heavy Phosphate Coated. Gas System is Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement. Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished. BCG M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key. Handguard is Daniel Defense RIS II MK18, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized. Daniel Defense Rail Panels made from Santoprene, heat resistant to 300° F.

Specifications for Daniel Defense MK18, URG, 10.3in 5.56 Complete Upper Receiver w/ Flash Hider:

Manufacturer: Daniel Defense
Caliber: 5.56x45mm NATO
Barrel Length: 10.3 in
Barrel Profile: Government
Gas System Length: Carbine Length
Barrel Twist Rate: 1-7
Handguard Type: Free-Float
Muzzle Device: Daniel Defense Flash Suppressor
Finish: Type III Hard Coat Anodized
Gun Model: AR-15
Condition: New
Attachment Type: Picatinny
Handguard Style: Quad Rail
Gun Rail: RIS II Rail
Gun Make: Daniel Defense
Additional Features: w/ Flash Hider
Barrel Material: Chrome Moly Vanadium
Gas System Type: Direct Impingement
Bolt Carrier Group Included: MIL-SPEC
Weight: 3.8 lb
Magazine Included: No
Threads per Inch: 1/2x28

Features:

  • UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
  • BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 10.3" Government Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
  • GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement
  • MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
  • BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
  • SIGHTS: Sold Separately
  • HANDGUARD: Daniel Defense RIS II MK18, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized
  • CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7076-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized
  • RAIL PANELS: Daniel Defense Rail Panels Made from Santoprene, Heat Resistant to 300 degrees F.

Package Contents:

  • Daniel Defense MK18, URG, 10.3in 5.56 Complete Upper Receiver w/ Flash Hider

Daniel Defense MK18, URG, 10.3in 5.56 Complete Upper Receiver w/ Flash Hider Orderable Models

List of Orderable Models

  • Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Flat Dark Earth, 10.3in, 23-004-08013-011 , MPN: 23-004-08013-012 , UPC: 852548002592 , Code: DDD-UFH-MK18R-230040801301
  • Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Black, 10.3in, 23-004-08013-006 , MPN: 23-004-08013-006 , UPC: 815604014045 , Code: DDD-UFH-MK18R-23-004-08013-006

Daniel Defense MK18, URG, 10.3in 5.56 Complete Upper Receiver w/ Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

  • USED Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Flat Dark Earth, 10.3in, 23-004-08013-011, EDEMO2, Used, Condition Fair , MPN: 23-004-08013-012-EDEMO2 , Code: DDD-UFH-MK18R-230040801301-EDEMO2
  • USED, Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Flat Dark Earth, 10.3in, 23-004-08013-011 , MPN: 23-004-08013-012-EDEMO , Code: DDD-UFH-MK18R-230040801301-EDEMO-RE-C
  • DEMO, Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Flat Dark Earth, 10.3in, 23-004-08013-011 , MPN: 23-004-08013-012-DEMO , Code: DDD-UFH-MK18R-230040801301-DEMO
  • USED Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Black, 10.3in, 23-004-08013-006, EDEMO2, Used, Condition Like New , MPN: 23-004-08013-006-EDEMO2 , Code: DDD-UFH-MK18R-23-004-08013-006-EDEMO2
  • USED, Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Flat Dark Earth, 10.3in, 23-004-08013-011 , MPN: 23-004-08013-012-EDEMO , Code: DDD-UFH-MK18R-230040801301-EDEMO-RE-B
  • USED, Daniel Defense MK18, URG, 5.56, 1/7, GOV, LPG, RIS II Rail, DDFS Complete Upper Receiver w/ Flash Hider, Black, 10.3in, 23-004-08013-006 , MPN: 23-004-08013-006-EDEMO , Code: DDD-UFH-MK18R-23-004-08013-006-EDEMO-RE-B
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