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.

This is the longer grip of the two DUTY frames. It holds 17+1 rounds, 19+1 with the extended plate, stands 5.6 in (143 mm) and weighs 27.7 oz (780 g) unloaded. Same slide, same 102 mm barrel as the carry-size, so the sight radius is identical; you buy the F for the grip and the extra rounds.

There is no manual thumb safety on this model. Drop safety comes from the firing pin block, the trigger safety and the drawbar safety, the way most modern striker-action pistols are set up. If you want a thumb lever, the MS version has one.

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.

The CZ DUTY 4.0 F suits anyone who wants a modern optics-ready 9mm with CZ's grip and a trigger that is better than the class average: the belt, the bedside and the range; the version to buy if you rarely need to hide the gun.

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. How many rounds does the CZ DUTY 4.0 F hold? 17+1 with the standard magazine and 19+1 with the longer base plate.