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(1 customer review)


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Daniel Defense M4 URG M4A1 FSP


Product Description

Daniel Defense M4 URG M4A1 FSP

Experience the pinnacle of tactical excellence with the Daniel Defense M4 URG M4A1 FSP.  It is a weapon system meticulously crafted to embody the spirit of USSOCOM SOPMOD Block II. Immerse yourself in top-tier performance and unrivaled precision as you explore the exceptional features of this upper assembly.

Daniel Defense M4 URG M4A1 FSP Key Features:

1. Premium USSOCOM SOPMOD Inspiration: Elevate your arsenal. The Daniel Defense M4 URG M4A1 FSP captures the essence of the elite USSOCOM SOPMOD Block II. Immerse yourself in this ingeniously crafted, precision weapon system demanded by special forces.

2. M4A1 FSP RIS II – Unparalleled Durability and Versatility: Discover durability and versatility in the Flat Dark Earth M4A1 FSP RIS II handguard. This robust platform withstands rigorous use while allowing customized accessory setups.

3. Enhanced Barrel Performance: Unleash precise firepower from the 14.5″ M4 profile barrel. It balances compactness and accuracy, enabling confident target engagement with exceptional performance.

4. Mil-Spec F-Marked Front Sight Base: Rapidly acquire targets using the reliable, military-grade F-Marked front sight base. It meets stringent standards for consistency.

5. Surefire SF3P Flash Hider / Suppressor Adapter: Master recoil with the Surefire SF3P. This flash hider and suppressor adapter reduces muzzle flash, enhancing control for accurate shots.

6. A1.5 Fixed Rear Sight – Precision Aiming: Elevate accuracy using the precise A1.5 Fixed Rear Sight for enhanced target acquisition when it matters most.

7. M16 Profile Full Auto Bolt Carrier Group: Experience smooth, reliable cycling from the M16 profile full auto bolt carrier group, engineered for optimal, consistent performance.

8. Rail Mounted QD Swivel Attachment Point: Embrace versatility. The QD swivel attachment point enables quick transitions, enhancing mobility across various scenarios.

FSP Upper Receiver Group’s use by elite forces:

Battle-Proven by America’s Tip of the Spear

When the target is engaged, the M4A1 FSP Upper proves its mettle. This is the upper receiver group battle-proven across countless operations by the nation’s elite warriors.

Unflinching Performance

Delta Force operators relied on its unflinching performance during the daring raid on ISIS leaders.  Navy SEAL teams wielded M4A1s fitted with these uppers during the tense situations with Somali pirates. For some Army Rangers sustaining fire in the valleys of Afghanistan, the M4A1 FSP was their steadfast companion.

No Matter the Mission, No Matter the Conditions

M4A1 FSP Engineered To Thrive

This upper is engineered to thrive when failure is not an option. From the unforgiving Afghan mountains to the unrelenting Iraqi deserts, the M4A1 FSP laughs at the harshest environments. Its chrome-lined barrel and anodized coating shrug off heat, grime and corrosion.

In subzero breaching operations or tropic humidity raids, the M4A1 cycles with absolute reliability. It funnels sand, mud, and powder residue without stoppage. When a malfunction could jeopardize the entire operation, this is the upper you want sending lead downrange.

One Mind – Any Weapon

The M4A1 FSP’s milspec construction provides essential modularity. Whether integrating a M203 grenade launcher, M68 Aimpoint, or AAC suppressor, this upper seamlessly incorporates any authorized weapon system. It allows the highest orders of firepower to flow from a single mind to interchangeable trigger pulls.

Daniel Defense M4A1 FSP Cornerstone of Modern Warfare

From assaulting enemy compounds to undermining terrorist networks, the M4A1 FSP is a cornerstone of modern warfare’s front line. Borne from Daniel Defense’s unrivaled manufacturing, it remains the gold standard for elite forces demanding absolute performance.

Over Engineered

This is the Upper that holds a steadfast duty to the nation’s guardians operating under extreme conditions. Forged from a solid 7075-T6 aluminum billet, the M4A1 Upper is over-engineered for combat. Its 16″ cold hammer-forged 4150 chrome-moly vanadium steel barrel delivers match-grade accuracy shot after shot.

In the chaos of battle, the Upper’s A2 flash hider helps maintain a clear field of view while the forward assist ensures no stoppage is left behind. Machined to mil-spec details, this is the real deal for the real deal fighters.

M4A1 FSP is a Force Multiplier

When your life is on the line, the Daniel Defense M4A1 FSP Upper is the warfighter’s choice. It’s designed from the ground up to be a force multiplier – made for the highest level of professional users to completely rely on. This Upper is home on the ranges of Bragg, in the forests of Quantico, and clearing the houses of Fallujah.

For the elite warriors placing it all on the line, the M4A1 FSP Upper shows why it wears the name Daniel Defense – no other considerations accepted.


This Daniel Defense M4 URG M4A1 FSP was built for customers wanting a weapon system inspired by USSOCOM SOPMOD Block II.  This upper features the M4A1 FSP RIS II in Flat Dark Earth, a 14.5” M4 profile barrel, Mil-Spec F-Marked front sight base, Surefire SF3P flash hider / suppressor adapter, A1.5 Fixed Rear Sight, M16 profile full auto bolt carrier group, and Rail Mounted QD Swivel Attachment Point with QD swivel.


  • 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, 14.5″ M4 Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
  • GAS SYSTEM: Mil-Spec F-Marked Front Sight Base, Carbine Length, Direct Impingement
  • MUZZLE DEVICE: Surefire SF3P Flash Hider / Suppressor Adapter, Precision Machined from US Mill-Certified Heat-Treated Stainless Steel Bar Stock, Black Ionbond DLC Coating, Pinned and Welded to Barrel
  • BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
  • SIGHTS: A1.5 Fixed Rear Sight, 6061-T6 Aluminum, Type III Hard Coat Anodized
  • HANDGUARD: Daniel Defense M4A1 FSP Rail Interface System (RIS) II, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized FDE
  • Made in the USA!
More Information
Mounting System Picatinny
Caliber 5.56mm NATO
Gas System Carbine
Barrel Length 14.5″
Barrel Profile M4
Product Weight 4.58 LBS
Manufacturer Daniel Defense

Read our Blog Post about this M4A1 FSP Upper Receiver Group.  

More Information
Mounting System Picatinny
Caliber 5.56mm NATO
Gas System Carbine
Barrel Length 14.5″
Barrel Profile M4
Product Weight 4.58 LBS
Manufacturer Daniel Defense

1 review for Daniel Defense M4 URG M4A1 FSP

  1. 5 out of 5

    (verified owner):

    Its a Daniel Defense M4A1 so you know its top quality and accurate. Western Sports is a great company to do business with. SUPER fast delivery and the tracking was spot on. If you have any questions, don’t hesitate to ask, they will respond very fast. Will definitely get another DD from them.

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