Daniel Defense DD4 MK18 RIII 5.56mm 10.3" URG, FDE

In stock
as of 03/01/2024 9:21PM CST
Store Inventory
Available Online2
Fountain Valley, CAOut of stock
The Colony, TX2
SKU: DD-23-004-81721-011
MPN: 23-004-81721-011
UPC: 818773023016

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The MK18 RIII upper receiver group features the RIS III rail, modeled after the proven RIS II. The RIS III offers M-LOK compatibility while retaining the same 6-bolt, bolt up system and M203 mounting ability(12.5", 13" rails only) as the SOCOM approved RIS II.

The MK18 RIII 10.3" URG features a 10.3" cold hammer forged, chrome-lined barrel, 9.5" RIS III handguard, M16 profile bolt carrier group, Grip-N-Rip ambidextrous charging handle and Daniel Defense flash suppressor.

Caliber 5.56 NATO
Gas System Carbine-Length
Barrel Length 10.3"
Barrel Profile Government


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, Carbine-length Gas System, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
GAS SYSTEM Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel and Mil-Spec Heavy Phosphate Coating, Carbine-length, Direct Impingement
MUZZLE DEVICE Daniel Defense Flash Suppressor,  17-4 PH Stainless Steel, Salt Bath Nitride Finished
SIGHTS Sold Separately
HANDGUARD Daniel Defense RIS III 9.5, Patented, 6-Bolt Bolt-Up System, CNC Machined of 6061-T6 Aluminum
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

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