Daniel Defense DD4 MK18 RIII 10.3" Black 5.56 NATO

The DD4™ MK18 RIII™ AR15-style short-barreled rifle is unmatched in size, weight, and performance. It combines our tried-and-true MK18 with our Daniel Defense RIS III Rail Interface System. This revolutionary system takes the proven design of our two-piece RIS II rails—used by U.S. Special Operations Command (SOCOM) since 2006—and reduces weight while adding versatility by utilizing popular M-LOK attachment. So, you get the same proven free-float barrel design, durable aircraft-grade aluminum construction, and an uninterrupted upper rail platform with Mil-Spec 1913 rail of the RIS II—plus seven M-LOK attachment points along the handguard and integral QD swivel attachment points on both sides!
The rest is all MK18, including a 10.3-inch Cold Hammer Forged barrel—the same length found in the MK18 upper most commonly used for CQB operations. An independently ambidextrous GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters, and the rifle comes with our ergonomic Daniel Defense Buttstock and Pistol Grip as well as three (3) low-profile rail ladders made from heat-resistant Santoprene to protect your support hand.  

MATERIALS & 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
BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 10.3" Government Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 Hardened Steel and Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement
MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
BOLT CARRIER GROUP: M16 Profile, MP Tested, Chrome Lined, Properly Staked Gas Key
BUFFER: H Buffer
SIGHTS: Sold Separately
HANDGUARD: Daniel Defense 9.5” RIS III, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized
CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7075-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, 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 LADDERS: Three (3) low-profile ladders made from Santoprene, heat resistant to 300° F.
Made in the USA
Mounting System
M-LOK
Caliber
5.56mm NATO
Muzzle Thread
1 ⁄ 2 × 28 TPI (Threads Per Inch)
Gas System
Carbine
Barrel Length
10.3"
Barrel Profile
Government
Product Weight
5.73 lbs
Length
26 3/4"– 29 7/8” (w/ muzzle device)
Magazine
DD Magazine
Case
Daniel Defense Full-Latch Impact Plastic Case