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Daniel Defense MK18 MK18 RIII 5.56 NATO Flat Dark Earth Pistol

The Daniel Defense MK18 RIII pistol is a compact 5.56 NATO firearm built around the proven MK18 configuration. It features a 10.3-inch cold hammer forged barrel, a Flat Dark Earth finish, an ambidextrous RIII lower receiver, and a free-floating RIS III rail for consistent accessory mounting. The semi-automatic direct-impingement action supports familiar AR-style controls, while the threaded muzzle accommodates compatible devices. An optics-ready Picatinny top rail and standard sights provide flexible aiming options for close-range use.

Key features

  • 10.3-inch cold hammer forged barrel balances compact handling with 5.56 NATO performance
  • RIS III free-floating rail provides a stable platform for lights, lasers, and other accessories
  • Ambidextrous RIII controls support convenient operation from either shoulder
  • Threaded 1/2x28 muzzle accepts compatible muzzle devices
  • Optics-ready Picatinny rail supports a wide range of sighting systems
  • Includes a 32-round magazine and polymer pistol grip

The Daniel Defense MK18 RIII delivers compact, configurable 5.56 NATO performance in a factory Flat Dark Earth pistol package.

Daniel Defense MK18 MK18 RIII 5.56 NATO Flat Dark Earth: quick facts

What caliber is the Daniel Defense MK18 MK18 RIII 5.56 NATO Flat Dark Earth?
It is chambered in 5.56 NATO.
How many rounds does it hold?
32+1 rounds; magazines included: 1.
How big and heavy is it?
Barrel length 10.3 inches, overall length 27.9 inches, weight 5.7 pounds.
What kind of action does it use?
Semi-Automatic.
Is it optic ready or threaded?
Optic ready: Yes; threaded barrel: Yes.
What sights and finish does it have?
Sights: Standard Sights; finish: Flat Dark Earth.
Is it new or used?
New, in the original packaging.
Can I buy it in Utah?
Yes. It ships to a licensed FFL dealer in Utah; you pick it up there after the background check. Handguns ship to the Utah dealer you pick at checkout, where you complete Form 4473 and the state background check before pickup.
Is it in stock?
Yes, at $2469.04. Orders leave within 1-2 business days; shipping is free over $999.

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