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Daniel Defense MK12 AR-15 SPR 5.56 NATO/.223 Rem 18" Rifle


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Product Details

Born of necessity, the evolution of the SPR comes home in the MK12 by Daniel Defense.
Constructed around an 18" stainless steel cold hammer forged barrel, the Daniel Defense MK12 rifle features precise alignment of the chamber to the bore. Some of the most durable barrels available, the barrels are bead blasted and chemically passivated in order to resist corrosion. Engineered with a rifle-length direct impingement gas system, the rifle utilizes the MK12 gas block system, built to Crane Specifications for USSOCOM and is precision CNC machined from 416 stainless steel and black oxide coated. The upper receiver is fed with an M16 profile BCG, utilizes a Vltor Mod 4 changing handle, and is equipped with a free-floating DDM4 Rail 12" allowing for the operator's choice of optics and accessories.
Materials and Construction:

  • LOWER RECEIVER: Mil-Spec with Enhanced Flared Magazine Well and
    Rear Receiver QD Swivel Attachment Point. 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

    Proprietary Blend of Stainless Steel, Cold Hammer Forged, 1:7" twist,
    18" MK12 Profile, Salt Bath Nitride Finished, and HP/MPI tested

  • GAS
    SYSTEM: MK12 Low Profile Gas Block CNC Machined of hardened 416
    stainless steel with Black Oxide Coating, Rifle-Length, Direct

  • 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

  • BUFFER: H Buffer

  • SIGHTS: Sold Separately

  • HANDGUARD: Daniel Defense DDM4 Rail™ 12.0, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized

  • RECEIVER EXTENSION: 6 Position Mil-Spec 7075-T6 Aluminum

  • BUTTSTOCK: Daniel Defense Buttstock, Glass Filled Polymer with Soft Touch Overmolding

  • PISTOL GRIP: Daniel Defense Pistol Grip, Glass Filled Polymer with Soft Touch Overmolding

  • RAIL PANELS: Daniel Defense Rail Panels made from Santoprene, heat resistant to 300° F.

  • Made in the USA!


5.56 NATO/.223 Rem


Hard Coat Type III Anodize

Gas System:

Rifle Length

Barrel Length:


Overall Length:

34.75"-37 7/8"


7.41 pounds

Magazines Included:

1-20 round Magpul PMAG






Product Specifications

RiflesSemi-Automatic, AR-15
ManufacturerDaniel Defense
Barrel Length18"