Daniel Defense

Daniel Defense DD4 FDE RIII Barreled Upper Receiver - 11.5" - Primary Arms Exclusive

All Daniel Defense upper receivers

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Daniel Defense DD4 FDE RIII Barreled Upper Receiver - 11.5" - Primary Arms Exclusive - Upper Receiver for AR-15 - view 1
Daniel Defense DD4 FDE RIII Barreled Upper Receiver - 11.5" - Primary Arms Exclusive - Upper Receiver for AR-15 - view 2
Daniel Defense DD4 FDE RIII Barreled Upper Receiver - 11.5" - Primary Arms Exclusive - Upper Receiver for AR-15 - view 3
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Daniel Defense

Overview

The Daniel Defense DD4 FDE RIII Barreled Upper Receiver is a complete assembly designed for AR-15 platforms, featuring an 11.5-inch barrel optimized for 5.56 NATO caliber ammunition. This upper receiver combines a compact length with reliable performance, making it suitable for various shooting applications, particularly in close-quarters scenarios. Given its specifications, it is often found in builds focused on 5.56 NATO caliber, catering to those looking for a dependable and tactical option.

Specifications

MPNDD-PA-EXCLUSIVE-11-5-556-FDE
PlatformAR-15
Caliber5.56 NATO
AssemblyComplete
ColorFDE
Barrel Length11.5

Available Merchants(1)

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$1,000
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Build history on GunPartPicker

Builders have been adding the Daniel Defense DD4 FDE RIII Barreled Upper Receiver - 11.5" - Primary Arms Exclusive to their builds on GunPartPicker since February 2026. All time, it ranks #247 of the 1,714 upper receivers builders have added.

It was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $999.99 at Primary Arms for when it comes back.

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Frequently Built With

The part most often added in each category by the builds that include this one

Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom

Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom

Lower Receiver$155 · out of stockin 14% of them
Strike Industries T-Bone AR-15 Charging Handle for .223/5.56 - Black/Black

Strike Industries T-Bone AR-15 Charging Handle for .223/5.56 - Black/Black

Charging Handle$35in 29% of them
Wilson Combat M16 Bolt Carrier Assy 5.56 NATO Polished Black Nitride

Wilson Combat M16 Bolt Carrier Assy 5.56 NATO Polished Black Nitride

Bolt Carrier Group$150in 29% of them
Geissele Automatics Super Semi-Automatic Enhanced SSA-E Two Stage AR-15 Trigger

Geissele Automatics Super Semi-Automatic Enhanced SSA-E Two Stage AR-15 Trigger

Trigger$250in 14% of them
SilencerCo Velos LBP 556 Rifle Suppressor, Black

SilencerCo Velos LBP 556 Rifle Suppressor, Black

Suppressor$870in 14% of them
Leapers UTG PRO Ambi AR-15 Grip Built in Storage Compartment, FDE - RBUPG01D

Leapers UTG PRO Ambi AR-15 Grip Built in Storage Compartment, FDE - RBUPG01D

Pistol Grip$12in 14% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Gas System

50.3%
Mid-Length50.3%
Carbine25.7%
Pistol11.4%
Rifle10.9%
Blowback1.3%
Other0.3%

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