Daniel Defense MK18 5.56mm AR Pistol

10.3" Cold Hammer Forged Barrel - RISII Quad Rail - SOCOM-Inspired Platform The Daniel Defense MK18 AR pistol is inspired by the original MK18, which has been extremely popular within Law Enforcement and Special Operations communities. This firearm is classified as a pistol and not a Short Barreled Rifle, eliminating NFA registration requirements. The MK18 pistol features the Picatinny quad rail Daniel Defense currently provides to USSOCOM and a 10.3-inch cold hammer forged barrel, the same length commonly used for CQB operations. The MK18 RISII features Daniel Defense's patented 6-bolt Bolt-Up System and has been rigorously tested prior to fielding by USSOCOM. Equipped with SB Tactical SBA3 pistol stabilizing brace with 5 positions of adjustability and integral ambidextrous QD swivel attachment point. The independently ambidextrous GRIP-N-RIP charging handle accommodates left- and right-handed shooters. Includes ergonomic Daniel Defense pistol grip with integral trigger guard and soft touch overmolding. Includes one 32-round magazine.

10.3" Cold Hammer Forged Barrel

The 10.3-inch barrel is cold hammer forged for exceptional strength, accuracy, and barrel life. This barrel length matches the configuration commonly used for CQB operations by special operations units, providing optimal balance between velocity, maneuverability, and effectiveness. The cold hammer forging process work-hardens the steel, creating a barrel that withstands extreme use while maintaining accuracy.

RISII Quad Rail System

The MK18 RISII (Rail Interface System II) features the same Picatinny quad rail Daniel Defense currently provides to USSOCOM. This rail system provides four continuous Picatinny rails for extensive accessory mounting capability including lights, lasers, vertical grips, and backup sights. The RISII has been rigorously tested and fielded by USSOCOM, validating its durability and reliability in demanding operational environments.

Patented 6-Bolt Bolt-Up System

Daniel Defense's patented 6-bolt Bolt-Up System provides exceptional rigidity between the rail and barrel nut. This mounting system ensures the rail maintains zero and withstands impacts without shifting, critical for maintaining zero with mounted accessories. The robust attachment system has been proven through extensive USSOCOM use.

SB Tactical SBA3 Pistol Stabilizing Brace

The SB Tactical SBA3 pistol stabilizing brace provides 5 positions of adjustability for different arm lengths and shooting positions. Integral ambidextrous QD swivel attachment points enable sling mounting on either side. The SBA3 design provides stability during firing while maintaining pistol classification.

GRIP-N-RIP Ambidextrous Charging Handle

The independently ambidextrous GRIP-N-RIP charging handle accommodates both left- and right-handed shooters. The extended latches provide positive purchase from either side, enabling reliable manipulation even with gloves or in adverse conditions. The independent operation allows single-handed charging from either side.

Daniel Defense Pistol Grip

The ergonomic Daniel Defense pistol grip features integral trigger guard and soft touch overmolding. The overmolding provides secure grip even when wet while the integral trigger guard maintains sleek profile. The grip angle and texture are optimized for positive control and comfortable extended shooting.

Non-NFA Pistol Configuration

As a pistol rather than Short Barreled Rifle, the MK18 does not require NFA registration, tax stamp, or Form 4 approval. This classification enables immediate transfer upon purchase while providing compact dimensions and CQB capability.

CQB Optimized Length

The 10.3-inch barrel length provides optimal performance for close quarters battle applications. This configuration delivers sufficient velocity for 5.56mm effectiveness at typical CQB ranges while maintaining exceptional maneuverability in confined spaces. The compact dimensions prove ideal for vehicle use, structure entry, and close-range engagements.

Law Enforcement and Special Operations Heritage

The MK18 design has proven itself extensively within Law Enforcement and Special Operations communities. This pistol configuration brings SOCOM-validated design and components to the civilian market, providing access to a platform with proven operational pedigree.

32-Round Magazine Capacity

The included 32-round magazine provides substantial capacity for defensive and tactical applications. The extended capacity reduces reload frequency during high-volume shooting or defensive situations.

Black and FDE Furniture

The combination of black receivers with Flat Dark Earth furniture provides distinctive appearance while the FDE components resist showing wear and maintain appearance through extended use. The Daniel Defense MK18 pistol delivers SOCOM-validated design and components in a non-NFA platform—bringing proven CQB capability to civilian shooters.

SPECIFICATIONS

• Manufacturer: Daniel Defense
• Model: MK18
• Configuration: Pistol (non-NFA)
• Platform: AR-15
• Caliber: 5.56mm NATO (.223 Remington compatible)
• Action: Semi-Automatic
• Barrel Length: 10.3 inches
• Barrel Type: Cold Hammer Forged (CHF)
• Rail System: RISII (Rail Interface System II)
• Rail Type: Picatinny Quad Rail
• Rail Mounting: 6-Bolt Bolt-Up System (patented)
• Brace: SB Tactical SBA3 Pistol Stabilizing Brace
• Brace Positions: 5 positions of adjustability
• QD Mount: Integral ambidextrous QD swivel attachment points
• Charging Handle: GRIP-N-RIP Ambidextrous
• Pistol Grip: Daniel Defense with soft touch overmolding
• Trigger Guard: Integral with pistol grip
• Furniture Color: Black / FDE (Flat Dark Earth)
• Receiver Finish: Black
• Magazine Capacity: 32 rounds
• Magazines Included: 1
• Intended Use: CQB, law enforcement, tactical applications
• Operational Heritage: USSOCOM-inspired design
• NFA Status: Non-NFA (pistol classification)