Daniel Defense DD4 RIII Upper Receiver Group
16" mid-length 5.56 URG built on the 12.5" RIS III M-LOK rail, with the DD BCG and GRIP-N-RIP charging handle included.
- Price
- $1,743
- Brand
- Daniel Defense
- Category
- Uppers
Featured in
Features
- •5.56 NATO
- •16" Government CHF barrel
- •Mid-length gas
- •RIS III 12.5" M-LOK rail
- •BCG & GRIP-N-RIP CH included
Capability Boosts
Recommended For
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Overview
The DD4 RIII Upper Receiver Group is Daniel Defense's general-purpose upper under the current DD4 naming. It pairs a 16" Government profile barrel with a mid-length gas system, which is the combination that gives up the least in either direction: enough barrel for full 5.56 velocity, and enough dwell for a softer impulse than a carbine-gas 16".
The barrel is cold hammer forged Chrome Moly Vanadium, chrome lined, and mil-spec heavy phosphate coated, with a 1:7 twist and an HP/MPI test behind it. Gas is taken through a pinned low-profile block CNC machined from 4140 hardened steel. Out front sits the Daniel Defense flash suppressor in salt bath nitrided 17-4 PH stainless.
Everything above the barrel is the RIII system. The 12.5" RIS III M-LOK rail free-floats the barrel and keeps a continuous 1913 top rail, the upper receiver is CNC machined 7075-T6 with indexing marks and M4 feed ramps, the bolt carrier group is the M16 profile unit Daniel Defense ships on every complete URG, and the GRIP-N-RIP ambidextrous charging handle is included. Sights and optics are sold separately, so the only thing between this upper and a complete rifle is a lower.
Key Features
- 16" Government profile cold hammer forged 5.56 NATO barrel, HP/MPI tested
- Mid-length direct impingement gas with a pinned low-profile 4140 gas block
- RIS III 12.5" M-LOK rail, CNC machined 6061-T6 aluminum
- CNC machined 7075-T6 upper receiver with indexing marks and M4 feed ramps
- M16 profile bolt carrier group included
- GRIP-N-RIP ambidextrous charging handle included
- Daniel Defense flash suppressor in salt bath nitrided 17-4 PH stainless
- Chrome lined bore with mil-spec heavy phosphate exterior
Pros
- +16" mid-length is the softest shooting general-purpose 5.56 configuration under 18 inches
- +RIS III rail and GRIP-N-RIP handle are the current-generation Daniel Defense parts, not legacy hardware
- +BCG and charging handle are included, so only a lower and an optic are left to buy
- +Complete upper avoids DIY gas block and headspace guesswork
- +No NFA paperwork at 16 inches
Cons
- −Priced close to complete-rifle money from other makers
- −The 12.55" rail leaves roughly three inches of a 16" barrel exposed past the handguard
- −Sights and optics are sold separately
- −Government profile barrel is heavier than a lightweight contour of the same length
Detailed Specifications
- caliber
- 5.56mm NATO
- barrelLength
- 16"
- barrelProfile
- Government
- barrelMaterial
- Chrome Moly Vanadium Steel, Cold Hammer Forged
- barrelFinish
- Chrome Lined, Mil-Spec Heavy Phosphate, HP/MPI Tested
- twist
- 1:7
- gasSystem
- Mid-length, Direct Impingement
- gasBlock
- Pinned Low Profile, CNC Machined 4140 Hardened Steel
- handguard
- RIS III 12.5" M-LOK, CNC Machined 6061-T6 Aluminum
- upperReceiver
- CNC Machined 7075-T6 Aluminum, Indexing Marks, M4 Feed Ramps
- bcg
- M16 Profile
- chargingHandle
- GRIP-N-RIP, Ambidextrous
- muzzleDevice
- Daniel Defense Flash Suppressor, 17-4 PH Stainless, Salt Bath Nitride
- threadPitch
- 1/2x28
- sku
- 23-191-20088-011
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Build Your Custom Configuration
Add the Daniel Defense DD4 RIII Upper Receiver Group to your build and see how it enhances your platform.