Daniel Defense MK18 SBR 5.56 NATO 10.3-inch Brown, 32rd

Daniel Defense MK18 Mil‑Spec SBR is a semi-automatic short-barreled rifle chambered in .223 Rem/5.56 NATO and configured for compact handling. The factory SBR pairs a 10.3-inch cold hammer forged, chrome-lined barrel with the Daniel Defense RIS II rail system and a purpose-matched buttstock and grip.

Key Specifications

• The barrel measures 10.3 inches for compact handling.
• Chambered in .223 Rem/5.56 NATO.
• Operates as a Semi-Auto action.
• Includes a 32-round Daniel Defense magazine.
• Features a Cold Hammer Forged barrel.
• The barrel is Chrome Lined for corrosion resistance and durability.
• Equipped with the RIS II MK18 rail (Bolt-Up System) for accessory mounting.
• Finished in Mil Spec+ Brown Cerakote.
• Receiver is CNC machined 7075-T6 aluminum.
• Barrel thread pattern is 1/2x28.

Configured to deliver compact, reliable performance, the MK18 blends service-proven components into a short-barreled platform well suited to close-quarters roles and compact-course training. Its combination of a cold hammer forged, chrome-lined barrel and the Daniel Defense RIS II rail provides a practical foundation for a range of accessories and optics.