Daniel Defense® M4A1 SOPMOD Block II Clone

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The Daniel Defense M4A1 SOPMOD Block II Clone is built for the hardcore, “USE WHAT THEY USE”, enthusiast that wants to be as close to the USSOCCOM specification as the law allows in a non-NFA firearm.

Inspired by the battle-tested platform used by special operations, this CLONE is built around a free-floating 14.5” M4A1 Heavy Barrel and M4A1 Rail Interface System (RIS) II handguard.  The Daniel Defense RIS II allows the operator to remove the bottom section of the rail and free float the M203 Grenade launcher.  While the 4-prong muzzle device is like a unicorn and nearly impossible to source, we’ve included the Surefire SF3P-556 3-prong Flash Hider, which allows the attachment of Surefire SOCOM Series Suppressors.  The trigger is the semi-auto version of the SOCOM rifle, the Geissele SSA 2-stage trigger.

As with the SOPMOD M4A1, the Block II Clone includes a list of authentic parts from the B5 System SOPMOD Coyote Buttstock to the receiver end plate and flat trigger guard. 


  • 5” M4A1 Heavy Barrel
  • M4A1 Rail Interface System II
  • B5 Systems SOPMOD Buttstock
  • Surefire SF3P-556 3 Prong Flash Hider/Suppressor Adaptor
  • Geisselle SSA 2-Stage Trigger
  • Mil-std Receiver End Plate
  • Mil-std Charging Handle
  • UID Label
  • A2 Pistol Grip
  • Metal Ejection Port Cover
  • Flat Trigger Guard
  • FDE Ladder Rail Covers
  • 30-Round Aluminum Magazine


  • LOWER RECEIVER: Mil-Spec with Enhanced Flared Magazine Well. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
  • 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″ M4A1 Heavy Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
  • GAS SYSTEM: MK12 Low Profile Gas Block CNC Machined of hardened 416 stainless steel with Black Oxide Coating, Carbine Length, Direct Impingement
  • MUZZLE DEVICE: Pinned and Welded Surefire SF3P-556-1/2-28 Flash Hider, Black Ionbond DLC Coating
  • BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
  • BUFFER: H Buffer
  • HANDGUARD: Daniel Defense M4A1 Rail Interface System (RIS) II FDE, CNC Machined of 6061-T6 Aluminum
  • CHARGING HANDLE: MIL-STD Charging Handle, 7075-T6 Auminum, Type III Hard Coat Anodized
  • RECEIVER EXTENSION: 6 Position Mil-Spec 7075-T6 Aluminum
  • BUTTSTOCK: B5 Systems, SOPMOD Polymer Stock, Quick Detach Mount, Coyote
  • PISTOL GRIP: A2 Pistol Grip, Mi-spec Polymer, Black
  • Made in the USA!


More Information
Mounting System Picatinny
Caliber 5.56mm NATO
Muzzle Thread 1⁄2×28 TPI (Threads Per Inch)
Gas System Carbine
Barrel Length 14.5"
Barrel Profile M4A1 Heavy
Length 31 ½” – 34 ¾”
Case Daniel Defense Full-Latch Impact Plastic Case
Manufacturer Daniel Defense
Daniel Defense Satisfaction Guarantee
Guaranteed Satisfaction

All Daniel Defense products carry a 100% satisfaction guarantee against defects in original materials and workmanship. If your Daniel Defense product shows evidence of such defects, Daniel Defense will make every accommodation to fix, repair, or replace your product in the most expeditious manner possible. Daniel Defense does not warranty products or damage caused to our products by the correct or incorrect installation of other manufacturer's products.

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