Daniel Defense MK18 RIII Upper Receiver Group
10.3" 5.56 NATO MK18-style URG with the RIS III M-LOK rail, DD BCG, and GRIP-N-RIP charging handle.
- Price
- $1,641
- Brand
- Daniel Defense
- Category
- Uppers
Featured in
Features
- •5.56 NATO
- •10.3" CHF barrel
- •Carbine gas
- •RIS III 9.5" M-LOK rail
- •BCG & GRIP-N-RIP CH included
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Daniel Defense Upper Receiver with Flash Hider Assembly MK18 RIII URG, 5.56x45mm NATO, 19.3 inch, 10.3 inch Barrel, Government Profile, Carbine Length, 1-7 Twist, 1/2x28 Thread, M-LOK Handguard, Flash Suppressor, Salt Bath Nitride, BLK, 23-004-81721-006
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90-day low $1259.99More AR-15 guides & articles
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Overview
The Daniel Defense MK18 RIII Upper Receiver Group is the modern M-LOK version of the MK18 upper. It keeps the 10.3" cold hammer forged 5.56 NATO barrel, carbine gas system, M16 profile bolt carrier group, and GRIP-N-RIP ambidextrous charging handle, then replaces the RIS II quad rail with the RIS III 9.5" M-LOK handguard.
The RIS III keeps a full-length Picatinny top rail while moving accessories to M-LOK slots at the sides and bottom. That makes the upper slimmer in the hand than the RIS II version, especially once rail panels and a white light are installed. For strict clone-correct builds, use the RIS II MK18 URG. For an MK18-style build that prioritizes current accessory mounting, the RIII is the cleaner buy.
Key Features
- 10.3" cold hammer forged chrome-lined 5.56 NATO barrel
- Carbine gas system with pinned low-profile gas block
- RIS III 9.5" M-LOK handguard with full Picatinny top rail
- M16 profile bolt carrier group included
- GRIP-N-RIP ambidextrous charging handle included
- Daniel Defense flash suppressor on 1/2x28 threads
- 7075-T6 upper receiver with Type III hard coat anodizing
Pros
- +Same 10.3" DD barrel and included BCG/charging handle as the MK18 URG
- +RIS III M-LOK rail is slimmer than the RIS II quad rail
- +Better white-light and cable-routing options for modern accessories
- +Complete upper avoids DIY gas-block and headspace guesswork
Cons
- −Not clone-correct for a Mod 1 MK18
- −Premium price matches the RIS II MK18 URG
- −10.3" barrel requires SBR registration before installing a stock, or another lawful configuration
Detailed Specifications
- caliber
- 5.56mm NATO
- barrelLength
- 10.3"
- barrelProfile
- Government
- barrelMaterial
- Chrome Moly Vanadium Steel, Cold Hammer Forged
- barrelFinish
- Chrome Lined, Mil-Spec Heavy Phosphate
- twist
- 1:7
- gasSystem
- Carbine Length, Direct Impingement
- gasBlock
- Pinned Low Profile, 4140 Steel, Phosphate
- handguard
- RIS III 9.5" M-LOK
- upperReceiver
- 7075-T6 Aluminum, Type III Hard Coat Anodized
- bcg
- M16 Profile, MPI Tested, Chrome Lined
- chargingHandle
- GRIP-N-RIP, Ambidextrous
- muzzleDevice
- DD Flash Suppressor
- threadPitch
- 1/2x28
- sku
- 23-004-81721-006
- madeIn
- USA
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Build Your Custom Configuration
Add the Daniel Defense MK18 RIII Upper Receiver Group to your build and see how it enhances your platform.