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Questions & Answers
Is the gas block adjustable

No. It's fixed.

by Chris, Verified Owner, December 15, 2024
Come with BCG ? Expert Answer

Yes, the Daniel Defense DD4 RIIIS URG includes a BCG and charging handle.

by Ethan, Gear Expert, April 25, 2024
Customer Reviews
Helpful Positive Review
Great upper. kind of heavy. by ts1012, Verified Owner, March 8, 2026
Fit and finish is excellent. Function has been 100% with an H2 buffer. Highly recommended. It is a bit heavy due to the RISIII rail but not terrible. Definitely not a lightweight build though.
1/1 found this helpful
Helpful Positive Review
PERFECTION! by Redacted, Verified Owner, October 13, 2024
Its a Daniel Defense what more do i need to tell you? 11 inch barrel is pretty gassed up and shoots like a dream suppressed!I will be buying more!
1/1 found this helpful
Helpful Positive Review
Amazing upper by Freedom lover, Verified Owner, February 13, 2024
I slapped this on top of a cheap but well made PSA lower and put a radian trigger, safety selector and charging handle I put a geissele h2 buffer and spring in the buffer tube and my pistol shoots like a dream. Very accurate for an 11.5 it was betwee...
Read More...
5/5 found this helpful
Helpful Positive Review
DD 11.5 upper by Ole Dirty, Verified Owner, April 23, 2024
Can never go wrong with DD. One of the best production line brands out there.
1/1 found this helpful
Most Recent Reviews
Upper receiver by Jake, March 4, 2026
Very good I highly recommend built very well and is made out of high quality and durable materials
Most Recent Reviews
Daniel Defense by Jacob j, February 22, 2026
Great would recommend. Very durable and have had no problems at all. High quality and built with great materials
Read All 12 Reviews
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Product Info for Daniel Defense DD4 RIIIS URG 11.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly

The DD4 RIIIS AR15 style Upper Receiver Group is built around a 11.5 inch Cold Hammer Forged Government Profile barrel with a Daniel Defense Flash Suppressor, a GRIP-N-RIP Charging Handle, and our carbine length gas system. It features a 10.5 inch lightweight RIS III railmodeled after the revolutionary RIS II two-piece handguard developed for SOCOM which features M-LOK attachment for lighter weight. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group.image

NFA DISCLAIMER

Once this part is assembled into a complete firearm, it becomes a regulated item by the National Firearms Act (NFA). Please check with your local and state municipalities for any further regulatory requirements. It is the buyer's responsibility to make sure they comply with all NFA rules and applicable laws.

Specifications for Daniel Defense DD4 RIIIS URG 11.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly:

Manufacturer: Daniel Defense
Caliber: 5.56x45mm NATO
Overall Length: 20.5 in
Barrel Length: 11.5 in
Barrel Profile: Government
Gas System Length: Carbine Length
Barrel Twist Rate: 1-7
Muzzle Device: Flash Suppressor
Finish: Salt Bath Nitride
Gun Model: AR-15
Condition: New
Fabric/Material: Multiple
Handguard Length: 10.5 in
Gun Rail: M-LOK
Gun Type: Rifle
Gun Make: Daniel Defense
Barrel Material: Chrome Moly
Bolt Carrier Group Included: MIL-SPEC
Charging Handle Included: MIL-SPEC
Magazine Included: No
Mount Type: M-LOK
Gas System: Carbine Length

Features of Daniel Defense DD4 RIIIS URG 11.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly:

  • UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
  • BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 11.5 inch Government Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
  • GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement
  • MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
  • BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
  • SIGHTS: Sold Separately
  • HANDGUARD: Daniel Defense RIS III 10.5, Patented, 6-Bolt Bolt-Up System, CNC Machined of 6061-T6 Aluminum
  • CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7076-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized

Package Contents:

  • Daniel Defense DD4 RIIIS URG 11.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly

Daniel Defense DD4 RIIIS URG 11.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly Orderable Models

List of Orderable Models

  • Daniel Defense Upper Receiver w/ Flash Hider Assembly DD4 RIIIS URG, 5.56x45, 20.5in, 11.5in BRRL, Gov Profile, Carbine, 1-7, 1/2x28, M-LOK, Flash Suppressor, Salt Bath Nitride, FDE, 23-191-02397-011 , MPN: 23-191-02397-011 , UPC: 818773023672 , Code: DDD-UFH-D4R3U11-2319102397011
  • Daniel Defense Upper Receiver w/Flash Hider Assembly DD4 RIIIS URG, 5.56x45, 20.5in, 11.5in BRRL, Gov Profile, Carbine, 1-7, 1/2x28, MLOK, Flash Suppressor, Salt Bath Nitride, BLK, 2319102397006 , MPN: 23-191-02397-006 , UPC: 818773023665 , Code: DDD-UFH-D4R3U11-23-191-02397-006

Daniel Defense DD4 RIIIS URG 11.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • EDEMO Daniel Defense Upper Receiver w/Flash Hider Assembly DD4 RIIIS URG, 5.56x45, 20.5in, 11.5in BRRL, Gov Profile, Carbine, 1-7, 1/2x28, MLOK, Flash Suppressor, Salt Bath Nitride, BLK, 2319102397006, EDEMO1 , MPN: 23-191-02397-006-EDEMO1 , Code: DDD-UFH-D4R3U11-23-191-02397-006-EDEMO-RE-A
  • DEMO, Daniel Defense Upper Receiver w/Flash Hider Assembly DD4 RIIIS URG, 5.56x45, 20.5in, 11.5in BRRL, Gov Profile, Carbine, 1-7, 1/2x28, MLOK, Flash Suppressor, Salt Bath Nitride, BLK, 2319102397006 , MPN: 23-191-02397-006-DEMO , Code: DDD-UFH-D4R3U11-23-191-02397-006-DEMO
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