Daniel Defense MK18 RIS II SBR 5.56 NATO 10.3" Barrel - MIL SPEC +

Daniel Defense MK18 RIS II SBR 5.56 NATO 10.3" Barrel - MIL SPEC +

The MK18 AR15 style firearm is unmatched in size, weight, and performance, and features the picatinny quad rail Daniel Defense provides to USSOCOM. The RIS II picatinny quad rail features a Bolt-Up System that has been rigorously tested prior to fielding by USSOCOM. The 10.3 inch Cold Hammer Forged barrel is the same length in use for the MK18 upper most commonly used for CQB operations. The independently ambi GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters. This rifle also comes with the ergonomic Daniel Defense Buttstock and Pistol Grip.

USSOCOM‑Issued RIS II Quad Rail
Military‑proven Picatinny rail with Bolt‑Up System for unmatched durability and accessory mounting.

10.3" Cold Hammer‑Forged Barrel
Chrome‑lined CMV steel with 1:7 twist for long‑term reliability and CQB accuracy.

Ambidextrous GRIP‑N‑RIP Charging Handle
Fully ambidextrous design for intuitive manipulation.

Mil‑Spec Receiver Set
7075‑T6 aluminum upper and lower with enhanced flared magwell and indexing marks.

Pinned Low‑Profile Gas Block
CNC‑machined 4140 steel block ensures consistent gas flow and durability.

M16‑Profile BCG
MP‑tested, chrome‑lined, and properly staked for maximum reliability.

Made in the USA
Built to the highest standards of quality and craftsmanship.

Specifications

• Caliber: 5.56 NATO
• Barrel Length: 10.3"
• Barrel Profile: Government
• Barrel Material: Chrome Moly Vanadium steel
• Barrel Treatment: Cold Hammer Forged, chrome lined, heavy phosphate coated
• Twist Rate: 1:7
• Gas System: Carbine‑length direct impingement
• Gas Block: Pinned low‑profile 4140 hardened steel
• Muzzle Thread: 1/2×28 TPI
• Muzzle Device: Daniel Defense flash suppressor (17‑4 PH stainless steel, nitride finished)
• Upper Receiver: 7075‑T6 aluminum, Type III hard‑coat anodized
• Lower Receiver: 7075‑T6 aluminum, flared magwell, QD point, Type III hard‑coat anodized
• Handguard: MK18 RIS II, 6061‑T6 aluminum, Type III hard‑coat anodized
• Bolt Carrier Group: M16 profile, MP tested, chrome lined, properly staked
• Charging Handle: GRIP‑N‑RIP ambidextrous
• Receiver Extension: 6‑position Mil‑Spec 7075‑T6 aluminum
• Buttstock: Daniel Defense polymer with soft‑touch overmolding
• Pistol Grip: Daniel Defense polymer with soft‑touch overmolding
• Rail Ladders: Three Santoprene ladders, heat‑resistant to 300°F
• Product Weight: 5.88 lbs
• Overall Length: 26 3/4" – 29 7/8" (with muzzle device)
• Magazine: 32-Round DD magazine