The Daniel Defense RIS II Complete Upper Receiver 5.56 NATO 12.5" Government Profile Barrel 23-004-20154-047 is a premium, factory-assembled upper receiver built to the exacting standards that have made Daniel Defense a leader in the AR-15 market. This complete upper features the iconic RIS II free-float rail system in Flat Dark Earth, a 12.5-inch Government profile barrel, and a carbine-length gas system. Designed for users who demand military-grade durability and performance, this upper offers exceptional accuracy, reliability, and modularity in a compact 5.56 NATO platform.
Why Choose the Daniel Defense RIS II Complete Upper?
The RIS II rail system was originally developed for U.S. Special Operations Forces and has since become one of the most respected free-float rail systems in the industry. The Daniel Defense RIS II Complete Upper combines this legendary rail with a high-quality 12.5-inch Government profile barrel and a carbine gas system, creating a balanced and highly maneuverable upper receiver. The Flat Dark Earth rail provides a tactical, low-visibility finish while offering extensive M-LOK and Picatinny mounting options. Whether you’re building a close-quarters carbine, a professional-grade rifle, or a high-performance SBR, this complete upper delivers the strength, accuracy, and modularity serious shooters expect from Daniel Defense.
Key Features of the Daniel Defense RIS II 12.5" Complete Upper
- RIS II Free-Float Rail System – Full-length Picatinny top rail with M-LOK compatibility on sides and bottom
- 12.5-Inch Government Profile Barrel – Cold hammer-forged barrel for exceptional accuracy and durability
- Carbine Length Gas System – Reliable gas operation optimized for the 12.5" barrel length
- Flat Dark Earth (FDE) Rail – Durable, non-reflective finish on the RIS II handguard
- A2 Flash Hider – Standard A2 flash suppressor for effective muzzle flash reduction
- Complete Upper Assembly – Includes bolt carrier group, charging handle, and barrel nut
- 5.56 NATO Chambering – Compatible with both 5.56 NATO and .223 Remington ammunition
- Model 23-004-20154-047 – Official Daniel Defense RIS II part number
Performance and Build Quality
The Daniel Defense RIS II Complete Upper Receiver is manufactured using premium materials and precision machining. The 12.5-inch Government profile barrel is cold hammer forged, providing outstanding accuracy, longevity, and resistance to throat erosion. The RIS II rail system is machined from 6061-T6 aluminum and features a robust free-float design that eliminates pressure on the barrel, improving overall accuracy. The carbine-length gas system is properly tuned for reliable cycling with a wide range of ammunition. Finished in Flat Dark Earth, the rail offers excellent corrosion resistance and a professional tactical appearance. Every component is built to meet or exceed military specifications, ensuring this upper performs reliably in demanding conditions.
Technical Specifications
| Product Name | Daniel Defense RIS II Complete Upper Receiver |
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| Model Number | 23-004-20154-047 |
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| UPC | 818773025355 |
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| Caliber | 5.56 NATO / .223 Remington |
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| Barrel Length | 12.5 inches |
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| Barrel Profile | Government Profile |
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| Gas System | Carbine Length |
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| Handguard | RIS II Free-Float Rail (Flat Dark Earth) |
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| Muzzle Device | A2 Flash Hider |
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| Product Type | Complete Upper Receiver |
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| Key Feature | RIS II Free-Float Rail System |
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| Best For | Close Quarters, SBR Builds, Tactical Applications |
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Legendary RIS II performance in a compact package.
The Daniel Defense RIS II 12.5" Complete Upper delivers military-proven durability and modern modularity.
Important Notice: This product is intended for lawful use only. It is the buyer’s responsibility to ensure the product is suitable for their intended application and that they comply with all applicable federal, state, and local laws regarding firearm ownership, possession, and assembly. Firearm laws vary significantly by jurisdiction. Always follow proper firearm safety rules. Keep out of reach of children. This product is intended for lawful use only.
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