The Daniel Defense DD4 RIII URG is a complete upper receiver group engineered for shooters who demand precision without regulatory hassle. This 5.56 NATO configuration pairs a 14.5″ barrel with Daniel Defense’s pinned-and-welded flash suppressor, resulting in a non-NFA setup that measures 16″ overall. No ATF Form 1 or tax stamp required.
Every Daniel Defense upper is hand assembled, quality assurance tested, and test fired before shipment. The RIS III 12.5″ free-float handguard uses Daniel Defense’s patented 6-bolt attachment system for rock-solid mounting. This design minimizes barrel harmonics, translating to tighter shot groups downrange.
Additionally, the FDE finish provides modern aesthetics with proven durability. The free-float rail isolates your barrel from external pressure. Therefore, accuracy remains consistent whether you’re shooting prone or tactical carbine. This upper suits competitive shooters, duty users, and serious sport rifle builders alike.
Built for Performance and Compliance
Furthermore, the RIS III handguard’s M-LOK slots accept industry-standard accessories without rail panels. The 6-bolt design spreads clamping force evenly. Consequently, your upper remains repeatable and returns to zero reliably.
Materials & Construction
Upper Receiver: Mil-Spec with Indexing Marks and M4 Feed Ramps, CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
Barrel: 14.5″ Government Profile, Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, Chrome Lined, Mil-Spec Heavy Phosphate Coated, HP/MPI Tested — with a Daniel Defense Flash Suppressor permanently pinned and welded to bring total barrel length to 16″, a non-NFA configuration that requires no tax stamp
Gas System: Pinned Low-Profile Gas Block, CNC Machined of 4140 Hardened Steel, Mil-Spec Heavy Phosphate Coating, Mid-Length, Direct Impingement
Muzzle Device: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished — pinned and welded to the barrel for 16″ overall length
Handguard: Daniel Defense RIS III 12.5, Patented 6-Bolt Bolt-Up System, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment
Bolt Carrier Group: M16 Profile Bolt Carrier Group, Mil-Spec MP Tested, Chrome Lined, with Properly Staked Gas Key
Charging Handle: Daniel Defense 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
Rail Panels: Daniel Defense Rail Panels, Santoprene, Heat Resistant to 300°F
Specifications
SKU / MPN
DD-23-191-20088-011
Product Type
Complete Upper Receiver Group
Item Condition
New
Caliber
5.56 NATO
Finish
FDE
Receiver Material
7075-T6 Aluminum, Type III Hard Coat Anodized
Barrel
14.5″ Government Profile, Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, Chrome Lined, Mil-Spec Heavy Phosphate Coated, HP/MPI Tested — with a Daniel Defense Flash Suppressor permanently pinned and welded to bring total barrel length to 16″, a non-NFA configuration that requires no tax stamp
Gas System
Pinned Low-Profile Gas Block, CNC Machined of 4140 Hardened Steel, Mil-Spec Heavy Phosphate Coating, Mid-Length, Direct Impingement
Handguard / Rail System
Daniel Defense RIS III 12.5, Patented 6-Bolt Bolt-Up System, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment
Bolt Carrier Group
M16 Profile Bolt Carrier Group, Mil-Spec MP Tested, Chrome Lined, with Properly Staked Gas Key
Charging Handle
Daniel Defense 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
Muzzle Device
Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished — pinned and welded to the barrel for 16″ overall length
Although the bare barrel measures 14.5 inches, Daniel Defense permanently pins and welds the flash suppressor to the muzzle, bringing the total barrel length to 16 inches. This is a non-NFA configuration — no ATF Form 1 or tax stamp is required for this upper as configured.
Why Buy from Western Sport?
Western Sport staff understand Daniel Defense builds and match uppers to lowers expertly.
Our team answers technical questions about barrel length, gas systems, and handguard compatibility before you buy.
We offer competitive pricing on premium Daniel Defense complete upper receiver groups.
Comprehensive after-sale support ensures your build functions flawlessly from day one.
Local inventory means fast pickup or expedited shipping to your door.
Frequently Asked Questions
Q: What ammunition performs best in the 5.56 NATO chamber?
A: Standard 5.56 NATO and .223 Remington ammunition both chamber and fire reliably in this upper. However, 5.56 NATO generally shoots slightly faster and is optimized for this rifle’s gas system. For accuracy and consistency, quality match-grade 5.56 rounds excel in this free-float setup.
Q: Which lower receivers are compatible with this complete upper?
A: This DD4 RIII URG mates with any mil-spec AR-15 lower receiver, including those from Aero, Anderson, or other manufacturers. The upper uses standard mil-spec receiver extensions and requires no modifications. Ensure your lower is properly assembled and headspaced by a qualified gunsmith before pairing.
Q: Does Daniel Defense offer other RIS III upper variants?
A: Daniel Defense manufactures the RIS III handguard in multiple configurations across barrel lengths and calibers. We carry this 14.5″ pinned-and-welded 5.56 model in FDE as our primary RIS III offering. Contact our staff to discuss other Daniel Defense upper options that may suit your mission.
Q: What’s included with this complete upper receiver group?
A: This complete URG includes the upper receiver, barrel, gas tube, bolt carrier group, charging handle, and handguard fully assembled. No lower receiver is included—you’ll pair this upper with your own mil-spec lower. Installation requires basic AR knowledge or a professional gunsmith for optimal results.
Q: What is the RIS III rail system on this upper?
A: The RIS III is Daniel Defense’s next-generation free-float handguard. It uses a patented 6-bolt Bolt-Up System for a more secure, repeatable zero than older quad-rail designs. Furthermore, M-LOK slots run along the rail for mounting lights, lasers, and grips.
Q: Do I need NFA paperwork for this upper?
A: No. Although the bare barrel measures under 16 inches, Daniel Defense permanently pins and welds the flash suppressor to reach a full 16 inches. As a result, this upper is a non-NFA configuration and requires no tax stamp.
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