This CNC Firearms build (brand part no. MK18DD4) puts the Daniel Defense MK18 platform to work in .300 Blackout, pairing the 10.3-inch barrel format the MK18 made famous with a cartridge purpose-built for short barrels and suppressors. The FDE-finished pistol wears an SB Tactical brace and ships with one 30-round magazine. CNC Firearms builds this configuration on the Daniel Defense foundation for shooters who want MK18 handling with .300 Blackout versatility. Among AR pistols, this build favors suppressor owners and truck-gun builders alike.

Key Specifications

• The platform is the Daniel Defense MK18 in pistol configuration.
• The chambering is .300 Blackout, optimized for short barrels and suppressed shooting.
• The barrel measures 10.3 inches, the classic MK18 length.
• The finish is Flat Dark Earth.
• Fitted with an SB Tactical pistol brace.
• Ships with one 30-round magazine.

Frequently Asked Questions

Is this an NFA item? No. It is a brace-equipped AR pistol, not a short-barreled rifle, and transfers like any other handgun through your FFL.

Why .300 Blackout in a 10.3-inch barrel? The cartridge was designed to burn its powder in short barrels, making it a natural fit for MK18-length builds and suppressed shooting.

Buy the CNC Firearms MK18 .300 Blackout Pistol

MK18 handling chambered for the short-barrel cartridge that suits it best is exactly what this CNC build delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.