Short. Proven. Loaded.
This Daniel Defense DDM4 10.3" AR Pistol comes factory-built with a cold hammer forged barrel, Maxim PDW brace, and includes a Primary Arms Cyclops Gen 2 optic—ready to run out of the box.

The Daniel Defense DDM4 AR Pistol is built around one of the most proven barrel lengths in 5.56—10.3 inches—delivering compact maneuverability without sacrificing reliability. Featuring Daniel Defense’s Cold Hammer Forged barrel with a 1/2x28 threaded muzzle, this pistol is engineered for durability and consistent performance under hard use.

Up front, the DD4 9.5" free-float rail provides ample real estate for lights and accessories while maintaining a slim, rigid profile. Out back, the Maxim PDW brace keeps the footprint compact and balanced—ideal for vehicle use, range work, or defensive setups.

This package includes a Primary Arms Cyclops Gen 2 optic with etched reticle, giving you fast target acquisition without relying on battery life alone. That means clarity, durability, and performance right out of the box.

Daniel Defense controls, furniture, and fitment are exactly what you’d expect—tight tolerances, smooth function, and the kind of consistency that made DD a household name in the AR world.

If you’re looking for a premium 5.56 AR pistol that doesn’t need immediate upgrades, this is it.

• DDM4 Lower Receiver
• 9.5" DD4 Flat Front Rail
• Maxim PDW Brace
• Primary Arms SLx 1X MicroPrism with Red Illuminated ACSS Cyclops Gen 2 Reticle