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Questions & Answers
Does Daniel Defense still sell the Mk12 complete upper receiver? Seems they only sell the complete rifle nowadays...? Expert Answer

We currently do not have the Daniel Defense MK12 Upper Receiver Group 18in available. I recommend contacting Daniel Defense in regards to the Daniel Defense MK12 Upper Receiver Group 18in being sold through them.

by Hunter, Gear Expert, September 27, 2022
Will this upper work with a Colt LE6940 lower? Expert Answer

Yes, it should.

by Jonathan D., Gear Expert, December 13, 2019
Customer Reviews
Helpful Positive Review DD MK12 upper by J. Callaway, Verified Owner, October 16, 2024
I wanted to build my take on a MK12 and after some research I selected the DD MK12 Upper receiver. It arrived in perfect condition and is very accurate. The first trip to the range was during a crazy driving rain storm. The remnants of hurricane H...
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2/2 found this helpful
Helpful Positive Review Favorite mk12 upper! by Bri, Verified Owner, August 9, 2024
One of the beat rifles I own and to me this is the real MK12. I love PRI also and have both. They are on par with each other all the way. Plus this ones chromed. I like the rail a lot more than others as it's slimmer. I'm happy they still produce thi...
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1/1 found this helpful
Most Recent Reviews Top of the line by Harrison, January 13, 2024
Daniel defense makes an amazing product. Would highly recommend
Most Recent Reviews Daniel defense Mk12 by Kyle Berger, Verified Owner, February 2, 2022
Top notch! From the product received to the customer service. From their supplier to my front door the estimate time was exactly in the window I received my product. I received a couple emails just keeping me updated on my order. Shipped on Monday an...
Read More...
Read All 4 Reviews
Caliber: 5.56x45mm NATO Barrel Length: 18 inBarrel Profile: MK12 Gas System Length: Rifle Length Finish: Nitride Color: Black Gun Model: AR-15 Weight: 5.23 lb

Code: DDD-UFH-23-142-10035

MPN: 23-142-10035

UPC: 815604016735

List: $1,755.00Save $123.00
$1,632.00

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Product Info for Daniel Defense MK12 Upper Receiver Group 18in

The Daniel Defense MK12 Upper Receiver Group is constructed around an 18-inch Stainless Steel barrel with a chamber created during the Cold Hammer Forging process, which ensures the most precise alignment of the chamber to the bore possible. This, along with being DLC finished, equates to unprecedented accuracy and durability. The MK12 barrel is engineered with a rifle-length direct impingement gas system and utilizes the MK12 gas block, which is built to Crane Specifications for USSOCOM. The MK12 gas block is precision CNC machined from 416 stainless steel and Black Oxide Coated. The new independently ambi GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters and is engineered for suppressed fire, with anti-gas features that redirect gas flow upward and away from the face and operator. The upper receiver is equipped with a free-floating DDM4 Rail 12.0 quad rail for allowing your choice of optics and accessories and is finished off with a Daniel Defense Improved Flash Suppressor.image

Specifications for Daniel Defense MK12 Upper Receiver Group 18in:

Manufacturer: Daniel Defense
Caliber: 5.56x45mm NATO
Barrel Length: 18 in
Barrel Profile: MK12
Gas System Length: Rifle Length
Finish: Nitride
Color: Black
Gun Model: AR-15
Gun Rail: Picatinny
Weight: 5.23 lb
Magazine Included: No
Mount Type: Picatinny

Features of:

  • UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
  • BARREL: Proprietary Blend of Stainless Steel, Cold Hammer Forged, 1:7in Twist, 18in MK12 Profile, DLC Finished, and HP/MPI Tested
  • GAS SYSTEM: MK12 Low Profile Gas Block CNC Machined of 416 hardened steel with Black Oxide Coating, Rifle 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 DDM4 Rail 12.0, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized
  • CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7075-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° F.

Package Contents:

  • Daniel Defense MK12 Upper Receiver Group 18in

Daniel Defense MK12 Upper Receiver Group 18in Orderable Models

List of Orderable Models

Daniel Defense MK12 Upper Receiver Group 5.56mm NATO 18 Inch MK12 Profile Barrel With Salt Bath Nitride Finish , MPN: 23-142-10035 , UPC: 815604016735 , Code: DDD-UFH-23-142-10035
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