Daniel Defense Mk18 Mod1 Upper Receiver Group (URG) - factory

$1,206.00 $1,099.00
(You save $107.00)
Daniel Defense Mk18 Mod1 Upper Receiver Group (URG) - factory

Daniel Defense Mk18 factory upper receiver group


factory new, with some upgrades.


Some like the new, I like the old DD. The newer DD come with black rail covers, but the FDE ladders are more historically correct to the original Crane Mk18s. DD was the provider of the Mk18 rails for the Mk18 Mod1, and these are the same rails.

The Daniel Defense MK18 Complete AR-15 Upper Assembly is a faithful recreation of the US Navy's Mk18 Mod 1 platform, and features a Premium 10.3" Cold Hammer Forged Barrel made from Mil-Spec 4150 Chrome-Moly Vanadium Steel that is Chrome Lined for durability and corrosion resistance. M4 feed ramps are incorporated into the barrel extension and upper to enhance reliable feeding, while a true 5.56x45 NATO chamber ensures that both commercial and higher pressure surplus mil-spec ammunition may be safely used. The bolt and carrier both pass a thorough Magnetic Particle Inspection (MPI) test for guaranteed structural integrity, and the gas key is properly staked to its mil-spec bolt carrier. This upper has the improved fully Nitrides bolt carrier and bolt. All steel BCG parts feature a full Nitride or Melonite finish and the steel barrel features heavy mil-spec phosphate coating for superior corrosion resistance and durability, while aluminum parts are Type III Hard Coat Anodized.

Nowhere else, but at Charlie's does the Daniel Defense Mk18 Upper Receiver clone 10.3" URG get the respect it deserves.  Daniel Defense has held true to the design of the Mk18 rail, the 9-1/2" RIS rail, in FDE, which was the original Mk18 rail.  Daniel Defense now provides us with a reasonable representation of the original Mk18 upper, with a few commercial licenses, that allow Daniel Defense and Charlie's Custom Clones to offer this Mk18 upper at a reasonable and honest price.

This upper comes equipped with a 9.5" Flat Dark Earth RIS II Mk18 Quad-Rail Handguard that covers a pinned, low profile gas block at the carbine gas port position and Free Floats the barrel for increased accuracy potential. The RIS II provides ample room for adding tactical accessories, while also creating a full length, uninterrupted top rail surface with the A4 Flat-Top receiver that can accommodate a shooter's chosen optic and/or iron sight arrangement. Complete with charging handle assembly and Daniel Defense Flash Hider, the MK18 upper is ready to drop onto any pistol or registered SBR small pin lower receiver. .

Technical Information:

  • Upper Receiver: DD branded* A4 Flat-Top
  • Barrel: 10.3" DD barrel
  • Barrel Contour: M4 Government
  • Barrel Material: 4150 Chrome Moly Vanadium, Cold Hammer Forged
  • Muzzle Thread Pattern: 1/2"-28
  • Chrome Lined: Yes
  • Barrel Finish: Mil-Spec Heavy Phosphate
  • Twist Rate: 1 in 7"
  • Chamber: 5.56x45mm NATO
  • M4 Feed Ramps: Yes
  • Muzzle Device: Daniel Defense Flash Hider
  • Gas System Length: Carbine
  • Gas Block Diameter: 0.750"
  • Handguard: RIS II Mk18 Quad Rail, Free Float, Anodized in Flat Dark Earth
  • Sights: None
  • Bolt Carrier Assembly Included: Yes, 8620 steel with Type 8 staked fasteners
  • Bolt Carrier Type: Mil-Spec, fully modern Nitride finished
  • Bolt: mil spec 9310 heavy carbon steel, fully modern Nitride finish • Includes Pinned Low Profile Gas Block
  • Weight: 3 lbs, 8.0 oz

*The Daniel Defense Upper Receivers come to us with either a small Daniel Defense logo on the left side (more common), or a large "DD Mk18" also on the left side.  Both are factory new.

Note:  This upper receiver groups ships with a milspec nitrided bolt carrier group, as many of Charlie's customers have requested this newer feature.  You can also elect to receive the Daniel Defense branded phosphated BCG as an option, if you prefer.

Read a review in The Truth about Guns .

Please feel free to ask questions before you buy.

All NFA laws apply.  If you are uncertain if you can own this, check federal National Firearms Act, also with your state authorities.  I am not your lawyer.  You need to make sure you can own it.

Note:  All ITAR regulations apply.  Charlie's deals in the real McCoy.  Your item most likely has parts that cannot be shipped outside of the USA, or owned in the USA by non-US Persons.  You take accountability to safeguard parts and the entire upper, and get necessary approvals to transport outside of the USA.