East Tennessee carries a lot of 9mm, and the CZ DUTY 4.0 is the newest option in the optics-ready service class. CZ moved to a serialized modular chassis for this gun, which sits inside a fiberglass-reinforced polymer frame, and paired it with a refined SFDA trigger: 5.6 pounds, 9 mm of travel, 4 mm of reset. The slide takes direct-mount red dots and keeps fixed sights for backup.

Knoxville and Maryville buyers after a carry pistol should start with the C compact, 15+1 rounds, 770 g and 135 mm tall. Up in Oak Ridge, Morristown or out toward Tazewell and La Follette, where the gun lives by the bed or in the truck, the F full-size with 17+1 is the better fit. MS versions of each add a manual thumb safety. All four share the 4-inch barrel, 7.4-inch length and $729 MSRP.

The F is the full-frame frame: 5.6 in (143 mm) tall, 27.7 oz (780 g) with the magazine in but empty, 17+1 rounds of 9mm on board and 19+1 with the longer base plate. The longer grip fills a big hand and settles the gun between shots.

MS stands for manual thumb safety. This model adds a thumb lever to the automatic 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.

Where the P-10 had a serial-numbered polymer frame, the DUTY 4.0 moves the serial number to an internal modular chassis. That is the headline. The rest follows the modern service-pistol formula done carefully: a striker SFDA trigger at 25 ± 4 N (5.6 ± 0.9 lbs) (0.16 in (4 mm) reset, 9 ± 1 mm (0.4 ± 0.04 in) travel), a 7.4 in (188 mm) long slide with direct-mount optics cuts, fixed sights and a 102 mm barrel without a thread.

Who is it for: the belt, the bedside and the range; the version to buy if you rarely need to hide the gun. If you already shoot a P-10, the DUTY is the next step in the same family, with a new chassis and the optics done right.

Choose your DUTY 4.0 and name the Tennessee dealer you want it shipped to. Tennessee has no permit to purchase and no state waiting period; your dealer runs the TICS background check at pickup. Ammo and gear ship direct to you. Price and stock are verified live when you order, before you pay.

Questions buyers ask: What check does a Tennessee dealer run at pickup? The TICS background check. There is no permit to purchase and no state waiting period in Tennessee. Can I run a red dot and still have iron sights? Yes. The DUTY 4.0 slide is direct-mount optics-ready and the fixed sights remain in place; CZ's own photos show Holosun, Aimpoint and Shield optics fitted. 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.