Daniel Defense MK18 Upper Flat Dark Earth 5.56 / .223 Rem 10.3-inch
860 $
Daniel Defense MK18 10.3-inch Upper FDE
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 Flat Dark Earth, and Daniel Defense low profile gas block.
NFA DISCLAIMER
Once this part is assembled into a complete firearm, it becomes a regulated item by the National Firearms Act (NFA). Please check with your local and state municipalities for any further regulatory requirements. It is the buyer’s responsibility to make sure they comply with all NFA rules and applicable laws.
Daniel Defense MK18 Upper Specifications:
- 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
- RAIL PANELS: Daniel Defense Rail Panels Made from Santoprene, Heat Resistant to 300° F.
- Made in the USA!
Shipping Restrictions
We ship firearms, ammunition, and related accessories only where permitted by applicable federal, state, and local laws. Customers are responsible for ensuring that the products they order are legal to own and receive in their jurisdiction.
Orders that cannot legally be shipped to the destination address will be canceled and refunded, subject to any applicable processing fees.
Firearm Shipments
- All firearms must be shipped to a licensed firearms dealer (FFL or equivalent licensed dealer where required by law).
- Customers must provide the receiving dealer's information before the order can be processed.
- Firearms cannot be shipped directly to residential addresses where prohibited by law.
- The receiving dealer may charge a transfer fee, which is the customer's
Ammunition Shipments
- Ammunition is shipped only to locations where it is legally permitted.
- Adult signature may be required upon delivery where required by law or carrier policy.
- Ammunition cannot be shipped to P.O. Boxes or other restricted delivery locations.
Order Processing
- Orders are typically processed within 1–3 business days after payment has been received and all required compliance checks have been completed.
- Orders placed on weekends or holidays will be processed on the next business day.
- Processing times may be extended during periods of high order volume or due to regulatory verification requirements.
Shipping Methods
We work with reputable carriers authorized to transport regulated products. Shipping options and estimated delivery times are displayed during checkout and may vary depending on destination and product type.

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