Daniel Defense MK18 RIII SBR 5.56 NATO – 10.3 in. – Black with FDE Rail

Daniel Defense MK18 RIII SBR 5.56 NATO – 10.3 in. Black w/ FDE Rail

The Daniel Defense DD4 MK18 RIII is a short-barreled rifle chambered in 5.56 NATO with a 10.3-inch cold hammer forged barrel. This variant pairs black receivers and furniture with the 9.5-inch RIS III M-LOK rail in Flat Dark Earth. The DD4 lower is fully ambidextrous, and the rifle ships with a Daniel Defense magazine and hard case. As an SBR, this rifle is an NFA item and transfers on an ATF Form 4.

10.3-Inch Cold Hammer Forged Barrel

The 10.3-inch barrel is cold hammer forged from chrome moly vanadium steel in a Government profile, chrome-lined with a Mil-Spec heavy phosphate finish, a 1:7 twist, and HP/MPI testing. The muzzle is threaded 1/2x28 and fitted with the Daniel Defense Flash Suppressor in 17-4 PH stainless with a salt bath nitride finish.

RIS III 9.5 Rail in Flat Dark Earth

The RIS III replaces the RIS II with a lighter M-LOK rail modeled on the SOCOM-developed design, finished in Flat Dark Earth Type III hard coat anodizing. It uses Daniel Defense's patented 6-Bolt Bolt-Up System, free-floats the barrel, has a detachable lower rail section, and carries integral flush QD points.

Fully Ambidextrous DD4 Lower

The bolt catch, safety selector, and magazine release all operate without moving the dominant hand off the grip. The lower has an enhanced flared magazine well and a rear receiver QD swivel attachment point. The GRIP-N-RIP charging handle is ambidextrous with an anti-gas design.

Furniture

The Daniel Defense buttstock and pistol grip are black glass-filled polymer with soft-touch overmolding; the stock adds a nonslip cheek weld, interchangeable butt pads, and an integral QD point, on a 6-position mil-spec receiver extension. No sights are included — sights are sold separately.

Product Specifications

What's Included

• MK18 RIII SBR
• Daniel Defense magazine
• Daniel Defense Full-Latch Impact Plastic Case

Specification note: This is a short-barreled rifle regulated under the National Firearms Act. It transfers on an ATF Form 4 with the applicable tax stamp, through a licensed dealer. Sights are not included.

Product identification: Daniel Defense DD4 MK18 RIII SBR, manufacturer part number 02-088-00319-047, UPC 818773022958. Specifications reflect the supplied product information.