Mk18 Mod1 Daniel Defense Upper Receiver Group FDE (URG)

$1,269.00 - $1,329.00
ships from our shop in 5 to 8 days (+/-)

Daniel Defense Mk18 upper receiver group

Custom made from factory parts, choose your BCG.  This is the Mk18 Mod1

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 price, and you choose your bolt carrier group.

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;  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 5.56mm 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 Nitrided 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.

This upper comes equipped with a 9.5" Flat Dark Earth (FDE) 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.

This item is custom configured by Charlie's from 100% factory parts.  Normally, Daniel Defense will send an upper receiver with barrel and rail configured, and we attach a flash hider, and give you your selection of bolt carrier group and charging handle.  We have found that many customers like to customize their upper, or do not like the factory "billboard" markings that Daniel Defense ships, so this gives you options.  We also give options to fit different budgets.  As such, this product does not ship in a Daniel Defense factory box.  We offer the factory configuration, see the next paragraph.

Charlie's also offers what is often called the "billboard' Mk18 upper receiver group.  This is the factory Mk18 receiver with the Mk18 RIS rail. It is a little more commercial.  Some like it.  The Mk18 Daniel Defense FDE Factory Upper Receiver Group

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
  • Charging Handle:  Mil-Spec Charging Handle***
  • Gas System Length: Carbine
  • Gas Block Diameter: 0.070"
  • 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, your choice of modern nitride coated military grade BCG, or the Daniel Defense phosphated chrome lined BCG
  • Bolt Carrier Type: Mil-Spec, fully modern Nitride finished
  • Bolt: mil spec 9310 heavy carbon steel, either nitrided or phosphated, based upon your choice of carriers
  • Includes Low Profile Gas Block**
  • Weight: 3 lbs, 8.0 oz
  • Does NOT ship in factory box.  

Other options, upgrades

Note on upper receiver builds: As you can imagine, at Charlie's, we get all sorts of configurations from our manufacturing partners.  For this upper, we usually get a complete upper from Daniel Defense, and work around the trimmings, like adding the BCG and flash hider and so forth.  Often times, we get the complete receiver group assembled by DD.  Occasionally we get raw parts and build from there.  What you get, however is a complete DD Mk18 upper receiver group, but without the box.  We strip the fancy stuff we get as it takes up a lot of space, and we bring to you a complete factory sourced upper receiver group.  Not that it matters, but most of the time, the upper is assembled by DD, and occasionally final assembly is done by Charlies.  In all cases you are getting 100% factory components.  As Charlie's tests all final assembly, we like to think you are getting the best of both worlds, as if the DD parts fail, we dont use them, and send them back.

 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 .

 ** The low profile gas block fits under the RIS rails, and has come in a number of varieties.  This is highly variable based upon availability from various suppliers that Daniel Defense uses.  Sometimes the gas block is pinned by DD, sometimes the assembly ships with a Mk12 gas block that has set screws.  As the supply chain is variable, different low profile gas blocks have been seen.  You will not know the difference one to the other in performance.

*** Standard mil spec charging handle, which has been standard with DD Mk18's for years.  Some versions have the newer Rip and Grip, which is an upgrade option at Charlie's.

Please feel free to ask questions before you buy.

All NFA laws apply.  You need to make sure you can own it, in the configuration in which you attach to a lower receiver.  This can be a pistol or a rifle, when assembled.  If assembled as a rifle, it will be short barreled rifle, and subject to NFA laws.  Owning the upper and a rifle lower could also be considered an NFA item.  If you are uncertain if you can own this, check federal National Firearms Act, also with your state authorities.   

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.