The Daniel Defense DDM4 PDW Regulator .300 BLK is a numbered short-barreled rifle package from CNC Firearms, built on Daniel Defense’s DDM4 PDW platform around a 7-inch barrel (CNC Firearms part no. CNCDDPDW300). Each Regulator comes fitted with a SilencerCo Omega suppressor and an extended handguard, with a black Vortex AMG UH-1 Gen II holographic sight on the top rail. CNC Firearms, the Custom & Collectable Firearms brand, limits the run to 300 sequentially numbered rifles finished in black. .300 Blackout is the natural partner for a 7-inch barrel and a can, so the whole package stays short for vehicle, home defense or close-quarters work. It suits a buyer who wants a complete, matched PDW setup or a numbered piece for the safe.

Key Specifications

• The chambering is .300 AAC Blackout, a cartridge designed to run efficiently from short barrels and behind a suppressor.
• Barrel length is 7 inches, the compact DDM4 PDW configuration that keeps overall length to a minimum.
• Rifling twist is 1:7, fast enough to stabilize the heavy subsonic bullets .300 Blackout is known for.
• The muzzle is threaded 5/8×24, the standard .30 caliber pitch that carries the included suppressor.
• The included suppressor is a SilencerCo Omega, paired on this build with an extended handguard for more rail space.
• The included optic is a Vortex AMG UH-1 Gen II holographic sight in black, mounted for fast target acquisition.
• Magazine capacity is 30+1, the standard AR-pattern count for a full load-out.
• The action is semi-automatic, running the proven DDM4 PDW operating system.
• The finish is black across the rifle and the included sight.
• Production is a sequentially numbered series of 300, which makes each Regulator a limited CNC Firearms piece.

Frequently Asked Questions

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

What comes in the package? The 7-inch .300 Blackout DDM4 PDW short-barreled rifle, a SilencerCo Omega suppressor with an extended handguard, and a black Vortex AMG UH-1 Gen II holographic sight.

Can the suppressor or the sight be bought separately? No. CNC Firearms states that the package materials and accessories are not sold separately.

Buy the Daniel Defense DDM4 PDW Regulator .300 BLK SBR Package

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through CNC Firearms‘s suppressed firearms lineup and our Lubbock, Texas team will handle the transfer.