Daniel Defense DD4 RIII S URG FDE

Product Description

The Daniel Defense DD4 RIII S URG FDE is a complete upper receiver group built for shooters who prioritize maneuverability without sacrificing modularity. This configuration pairs a short 11.5″ cold hammer forged barrel with Daniel Defense’s RIS III rail system—the shortest RIS III-equipped upper Daniel Defense manufactures.

In 5.56 NATO, this upper delivers reliable ballistics in tight spaces. Every Daniel Defense upper ships hand assembled, quality assured, and test fired by the manufacturer. The result is consistent performance you can trust from day one.

The RIS III handguard gives you mounting flexibility for optics, lights, and accessories. Additionally, the FDE finish blends durability with a modern tactical aesthetic. Whether you’re building a specialized rifle or upgrading an existing platform, this complete upper simplifies your assembly process.

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: 11.5″ Government Profile, Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, Chrome Lined, Mil-Spec Heavy Phosphate Coated, HP/MPI Tested
• Gas System: Pinned Low-Profile Gas Block, CNC Machined of 4140 Hardened Steel, Mil-Spec Heavy Phosphate Coating, Carbine-Length, Direct Impingement
• Muzzle Device: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
• Handguard: Daniel Defense RIS III 10.5, 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

This upper ships with a barrel measuring under 16 inches. Installing it on a rifle-configured AR-15 lower receiver would create a Short-Barreled Rifle (SBR), which is regulated under the National Firearms Act. Buyers who plan to build this into a rifle-configured firearm should first submit ATF Form 1 and obtain an approved tax stamp, or install it on a pistol-configured lower consistent with current ATF rules. Western Sport cannot advise on individual compliance — buyers are responsible for following all applicable federal and state law.

Why Buy from Western Sport?

• Western Sport combines local expertise with nationwide shipping for Daniel Defense firearms and uppers.
• Our knowledgeable staff provides guidance on compatibility, build questions, and platform selection.
• Competitive pricing on complete upper receiver groups reflects our direct relationships with manufacturers.
• We support your build with detailed product information and responsive after-sale service.

Frequently Asked Questions

Q: What ammunition performs best in 5.56 NATO with an 11.5″ barrel?

A: 5.56 NATO ammunition of 55 to 77 grains works reliably in short-barrel uppers. Faster-burning powders optimize velocity from the 11.5″ barrel length. Visit a local range to test your preferred load for accuracy and reliability.

Q: What lower receivers work with this Daniel Defense complete upper?

A: This upper accepts any mil-spec AR-15 lower receiver. Ensure your lower is properly headspaced and assembled. Daniel Defense uppers are manufactured to strict tolerances for compatibility with standard platforms.

Q: How does the RIS III handguard compare to other Daniel Defense rail systems?

A: The RIS III offers integrated mounting along its full length for maximum customization. It is lighter and more modular than earlier generations. The RIS III remains Daniel Defense’s premium rail platform for modern combat builds.

Q: What’s included with this complete upper receiver group, and do I need anything else?

A: A complete upper receiver group includes the upper receiver, barrel, handguard, gas tube, and bolt carrier group. You will need a compatible lower receiver, buffer tube assembly, and stock to complete your rifle. Check your local and federal regulations before assembly.

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: It depends on your lower receiver. Installing this upper on a pistol-configured lower with no stock keeps the build classified as a pistol. However, installing it on a rifle-configured lower, or adding a stock, creates a short-barreled rifle and requires an approved ATF Form 1 first.

Additional information