Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
You May Also Like
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
(56)
List: $12.95 $11.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
(35)
List: $14.95 $13.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
(25)
List: $14.95 $14.19
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(52)
List: $17.95 $16.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
(35)
List: $15.95 $13.95 Save Up to 13%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
(12)
List: $22.95 $20.45 Save Up to 11%
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
(12)
List: $15.95 $14.95 Save Up to $1.00
Best Rated Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
(11)
List: $26.99 $15.95 Save Up to 11%
Walker Defense Research 3 M-LOK Slot Length Nile Silicon Carbide M-LOK Rail Covers, 3 Pack, NILE-3-SLOT-3-PACK
Walker Defense Research 3 M-LOK Slot Length Nile Silicon Carbide M-LOK Rail Covers, 3 Pack, NILE-3-SLOT-3-PACK
(3)
List: $59.99 $57.99 Save Up to $2.00
Coupon Available PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
(112)
List: $14.99 $12.99 Save Up to 13%
Customer Reviews
Helpful Positive Review
DD Riii Review by Zach, Verified Owner, January 18, 2024
I have owned many different rails from Aero, Giessele, PSA and others. This is the most rigid/sturdy rail I have found. Impressed with the overall design.
1/1 found this helpful
Helpful Positive Review
fast shipping. well packaged by E, Verified Owner, February 9, 2024
Secure packaging. Fast shipping with signature required. Took it to the range and was very accurate with tight groupings. No malfunctions with many different ammo types. Super clean finish. Daniel Defense is known for the best quality control in the ...
Read More...
1/1 found this helpful
Helpful Positive Review
Very high qaulity by Hunter, November 4, 2023
I am beyond happy with this upper. I’d say it’s one of the best on the market.
1/1 found this helpful
Most Recent Reviews
Daniel Defense, GREAT As Always! by Sam, Verified Owner, March 7, 2025
I own several Daniel Defense rifles, and I really wanted to get my hands on the DD4 RIII in 16" barrel. This has fast become my favorite "all purpose" rifle. It is balanced, accurate, and just plain good! I can't recommend it enough. Go get one t...
Read More...
Read All 4 Reviews
Show In Stock Only
3 Models Available
Color
All
Condition
All
Firearms Threads Per Inch
All
Search

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for Daniel Defense DD4 RIII URG 16 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly

The DD4RIIIUpper Receiver Group is built around a 16 inch Cold Hammer Forged Government Profile barrel, a GRIP-N-RIP Charging Handle, and our mid-length gas system, known to have a smoother recoil impulse, which adds to this upper's accuracy by allowing for quick but precise rapid fire. It features a 12.5 inch lightweight RIS III railmodeled after the revolutionary RIS II two-piece handguard developed for SOCOMfeatures M-LOK attachment for lighter weight while still offering M203 grenade-launcher attachment. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier groupimage

Specifications for Daniel Defense DD4 RIII URG 16 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly:

Manufacturer: Daniel Defense
Caliber: 5.56x45mm NATO
Overall Length: 25 in
Barrel Length: 16 in
Barrel Profile: Government
Gas System Length: Mid Length
Barrel Twist Rate: 1-7
Muzzle Device: Flash Suppressor
Finish: Salt Bath Nitride
Gun Model: AR-15
Fabric/Material: Multiple
Handguard Length: 12.5 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: Mid Length

Features of Daniel Defense DD4 RIII URG 16 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, 16 inch Government Profile, Mid-length Gas System, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
  • GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel and Mil-Spec Heavy Phosphate Coating, Mid-length, Direct Impingement
  • MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
  • SIGHTS: Sold Separately
  • HANDGUARD: RIS III 12.5 inch, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment
  • CHARGING HANDLE: 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

Package Contents:

  • Daniel Defense DD4 RIII URG 16 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly

Daniel Defense DD4 RIII URG 16 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly Orderable Models

List of Orderable Models

  • DEMO, Daniel Defense Upper Receiver with Flash Hider Assembly DD4 RIII URG, 5.56x45mm NATO, 25 inch, 16 inch Barrel, Government Profile, Mid-length, 1-7 Twist, 1/2x28 Thread, M-LOK Handguard, Flash Suppressor, Salt Bath Nitride, FDE, 23-191-20088-011 , MPN: 23-191-20088-011-DEMO , Code: DDD-UFH-D4R3U16-23-191-20088-011-DEMO
  • Daniel Defense Upper Receiver with Flash Hider Assembly DD4 RIII URG, 5.56x45mm NATO, 25 inch, 16 inch Barrel, Government Profile, Mid Length, 1-7 Twist, 1/2x28 Thread, M-LOK Handguard, Flash Suppressor, Salt Bath Nitride, BLK, 23-191-20088-006 , MPN: 23-191-20088-006 , UPC: 818773023399 , Code: DDD-UFH-D4R3U16-23-191-20088-006
  • Daniel Defense Upper Receiver with Flash Hider Assembly DD4 RIII URG, 5.56x45mm NATO, 25 inch, 16 inch Barrel, Government Profile, Mid-length, 1-7 Twist, 1/2x28 Thread, M-LOK Handguard, Flash Suppressor, Salt Bath Nitride, FDE, 23-191-20088-011 , MPN: 23-191-20088-011 , UPC: 818773022996 , Code: DDD-UFH-D4R3U16-23-191-20088-011

Daniel Defense DD4 RIII URG 16 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Daniel Defense Upper Receiver with Flash Hider Assembly DD4 RIII URG, 5.56x45mm NATO, 25 inch, 16 inch Barrel, Government Profile, Mid Length, 1-7 Twist, 1/2x28 Thread, M-LOK Handguard, Flash Suppressor, Salt Bath Nitride, BLK, 23-191-20088-006 , MPN: 23-191-20088-006-EDEMO , Code: DDD-UFH-D4R3U16-23-191-20088-006-EDEMO-US-C
Compare (0)
Last updated 2026-06-26 UTC.