CZUB® CZ DUTY 4.0 F Pistol / 9×19 mm

The CZ DUTY 4.0 F is a full-size striker-fired pistol chambered in 9×19 mm. Its serialized modular chassis can be transferred between compatible grip modules, while the 4.0 F configuration combines a 4" cold hammer-forged barrel with a full-size grip for 17- and 19-round magazines. Fully ambidextrous controls, trigger-free disassembly, and a direct-mount optics-ready interface support duty, defensive, and training use.

Serialized Modular Chassis

The functional core of the CZ DUTY is a removable serialized chassis containing the pistol’s primary fire-control components. It can be removed from the polymer grip module and installed in another compatible configuration.

Because the grip module is separate from the serialized chassis, the grip size and profile can be changed without replacing the pistol’s core serialized assembly.

Interchangeable Grip Modules

The CZ DUTY uses complete interchangeable grip modules rather than conventional replaceable backstraps. Small, medium, and large modules offer different palm-swell profiles and trigger reaches, allowing the pistol to be adapted more extensively to the shooter’s hand.

The fiberglass-reinforced polymer construction provides mechanical and thermal stability without adding unnecessary weight.

Full-Size Grip with a 4" Barrel

The 4.0 F configuration combines a 4" cold hammer-forged barrel with a full-size grip. It accepts standard 17-round magazines as well as 19-round magazines equipped with extended base pads.

A pronounced cutout at the bottom of the grip provides additional purchase on the magazine during forced removal, particularly when dirt, mud, or freezing conditions interfere with a normal reload.

Refined Striker-Fired Trigger

The patented striker-fired trigger system is designed to provide smooth travel, a defined wall, a clean break, and a short, tactile reset. This 4.0 F configuration does not include a manual safety.

Its mechanical safety system incorporates a trigger safety, firing pin block, and out-of-battery safety. The pistol can also be field-stripped without pulling the trigger.

Direct-Mount Optics-Ready Interface

The redesigned optics-ready interface uses interchangeable locating pins to adapt the slide to several common red dot footprints. Optics using the Trijicon RMR, Shield RMS/RMSc, Holosun K, and Leupold DeltaPoint Pro footprints can be mounted directly to the slide without an adapter plate.

Separate adapter plates are available for selected enclosed-emitter optics, including the Aimpoint Acro P-2 and Holosun HE509T.

Lower-Third Co-Witness Sights

This configuration is equipped with luminescent iron sights optimized for use with a slide-mounted red dot. They remain visible in the lower portion of the optic window, providing a lower-third co-witness and a conventional backup sighting system.

Fully Ambidextrous Controls

The slide release and magazine release are accessible from either side of the pistol without requiring component reversal. Extended front and rear cocking serrations provide a secure contact surface for different slide-manipulation techniques.

Textured grip surfaces and a serrated support-hand index area above the trigger guard contribute to consistent control without making the grip unnecessarily abrasive.

Ergonomics Developed with DiFEND

The grip geometry was developed using CZ’s DiFEND human-factors methodology. The design focuses on natural alignment in the hand, practical access to the controls, and accommodation of different hand sizes through the interchangeable grip modules.

Tested for Duty-Level Durability

CZ specifies a service life of 50,000 rounds with standard ammunition or 25,000 rounds with DM51 overpressure ammunition, including an initial 10,000-round period without parts replacement. Testing based on NATO STANAG AC/225 methodology included drops and exposure to water and debris.

The cold hammer-forged barrel and nitrided metal components provide resistance to wear and corrosion during extended use.

Key Features:

• Full-size striker-fired pistol chambered in 9×19 mm
• Serialized modular chassis
• Interchangeable small, medium, and large grip modules
• 4" cold hammer-forged barrel
• Full-size grip compatible with 17- and 19-round magazines
• Grip cutout for positive magazine removal
• No manual safety on this configuration
• Trigger safety, firing pin block, and out-of-battery safety
• Field stripping without pulling the trigger
• Direct mounting for RMR, RMS/RMSc, Holosun K, and DeltaPoint Pro footprints
• Optional adapter plates for selected enclosed-emitter optics
• Luminescent sights with lower-third co-witness
• Fully ambidextrous slide release and magazine release
• Extended front and rear cocking serrations
• Nitrided metal components
• Tested according to NATO STANAG-based methodology