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.

No image available

Affiliate links (?)

Check Best Price

View at Optics Planet

Add to Build

Quick Specs

Price: $1,454
Weight: N/A
Brand: Daniel Defense
Category: upper

Features

•5.56 NATO
•10.3" CHF barrel
•Carbine gas
•RIS III 9.5" M-LOK rail
•BCG & GRIP-N-RIP CH included

Capability Boosts

Reliability+2

CQB+3

Modularity+1

Recommended For

Home Defense+5

first pistol+5

new shooters+5

self defense+5

bear defense+5

Competition+4

+25 more

Where to Buy

Compare current prices and availability from retailers we work with.

RetailerPriceAvailabilityUpdatedShop

Optics Planet

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

$1454.00

Out of stock

2d ago

View offer

Compatibility Tags

family: ar-patterninterface: picatinny-tophandguard: mlokbarrel: ultra-compactthread: 1/2x28

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