We lead with lever guns and single actions, but even a six-gun house keeps one modern 9mm on the shelf, and CZ's new DUTY 4.0 is the one we picked. It is the newest striker-fired pistol in a family that started with the CZ 75 and continued with the P-10. The serial number sits on an internal modular chassis, the grip frame is fiberglass-reinforced polymer, the barrel is 4 inches and unthreaded, and the sights are fixed. The slide is cut for direct-mount red dots.

For the Fort Worth, Amarillo and San Angelo crowd, the Oklahoma City, Tulsa and Guthrie folks, and anyone up around Cheyenne and Cody, it is a fair trade-off next to a revolver: 15+1 in the DUTY 4.0 C compact or 17+1 in the F full-size, a 5.6-pound SFDA trigger with a 4 mm reset, and the option of an MS model with a manual thumb safety for those who like a lever under the thumb.

Capacity on the full-size is 17+1 standard and 19+1 with the extended base plate. Height 143 mm (5.6 in), empty weight 780 g (27.7 oz). It is the duty-belt, range and home-defense version of the line, and the one most shooters find easiest to shoot well.

MS stands for external safety. This model adds a frame-mounted lever to the internal safeties every DUTY has: the firing pin block, the trigger safety and the drawbar safety. Agencies and shooters who want a positive on/off control choose this version; the trigger itself is unchanged.

What is new under the slide is the registered modular chassis. The serial number lives on the internal chassis, not on the polymer grip, so the frame module is a part you can change while the gun stays the same gun. Around it CZ put a reworked SFDA striker trigger, rated at 25 ± 4 N (5.6 ± 0.9 lbs) with a 4 mm (0.16 in) reset and 9 ± 1 mm (0.4 ± 0.04 in) of travel, and a slide cut for direct-mount optics. CZ's own photos show it wearing Holosun, Aimpoint and Shield dot sights.

The CZ DUTY 4.0 F MS suits anyone who wants a modern optics-ready 9mm with CZ's grip and a trigger that is better than the class average: home defense, duty use, competition and long range sessions where the extra grip and two more rounds matter.

We ship to FFL dealers nationwide. Name the dealer you want at checkout and the DUTY 4.0 goes to them; your dealer applies your state's law at pickup, whether that is a permit, a wait or only the federal background check. Live price and availability are confirmed as you order.

Questions buyers ask: How is the DUTY 4.0 different from a CZ P-10? The DUTY 4.0 is CZ's newer generation: a serialized modular chassis, a refined SFDA trigger and a direct-mount optics slide. CZ has not confirmed that P-10 magazines fit. Is there a version with a thumb safety for someone used to a single action? Yes. The DUTY 4.0 C MS and F MS add a manual thumb safety to the standard internal safeties. Is the CZ DUTY 4.0 F MS the same gun as the F? Yes, apart from the manual thumb safety. Chassis, trigger, slide and the 17+1 capacity are identical.