Show-Me State shooters have been asking when CZ's next striker gun would land, and here it is. The DUTY 4.0 is a 9x19mm service pistol built on a serialized modular chassis, which means the polymer grip frame around it can change while the serial number stays put. Four versions come to Missouri: the DUTY 4.0 C compact with 15+1 rounds, the full-size DUTY 4.0 F with 17+1, and an MS version of each that adds a manual thumb safety. All four share the same 4-inch barrel, a direct-mount optics-ready slide and fixed sights.

From Chesterfield and St. Charles down the river to Ste. Genevieve and Perryville, and west to Rolla and Columbia, this is the kind of pistol Missouri buyers pick for the nightstand, the range bag and everyday carry. The compact rides easier under a shirt; the full-size gives a longer grip for duty belts and match days. Both weigh under 28 ounces.

Full-size means 17+1 rounds, a grip that takes the whole hand and a frame 5.6 in (143 mm) high. With the extended floor plate the count goes to 19+1. Empty weight is 27.7 oz (780 g), which soaks up recoil without making the gun heavy on a belt.

CZ built the DUTY around a serialized chassis that the polymer polymer grip wraps around, the same idea that lets a buyer change frame size without buying a new serialized gun. The trigger is a refined SFDA striker unit, 25 ± 4 N (5.6 ± 0.9 lbs) pull, 0.16 in (4 mm) reset, 9 ± 1 mm (0.4 ± 0.04 in) travel. The slide takes optics by direct mounting; CZ's product photos show Holosun, Aimpoint and Shield units in place. Sights are fixed, the 102 mm barrel is not threaded.

The standard model skips the manual thumb safety and keeps the three passive ones: firing pin block, trigger safety and trigger-bar safety. Same chassis, same trigger and slide as the MS; only the lever is missing.

Best fit: the belt, the bedside and the range; the version to buy if you rarely need to hide the gun. Shooters coming from a CZ 75 will recognize the grip angle; buyers coming from any other striker gun will notice the trigger first.

Missouri makes this simple. There is no permit to acquire and no waiting period, so once your DUTY 4.0 reaches the Missouri dealer you named at checkout, that dealer runs the background check and hands it over the same visit. Ammo and gear ship straight to your door. Price and stock are confirmed live when you order, before you pay.

Questions buyers ask: Do I need a permit to buy the CZ DUTY 4.0 in Missouri? No. Missouri repealed its permit to acquire in 2007 and has no waiting period. Your dealer runs the federal background check when you pick it up. Which DUTY 4.0 is better for carry in St. Louis traffic and summer heat? The C compact is 5.3 inches tall and carries 15+1, so it hides better under light clothing. The F adds a longer grip and two more rounds for range or duty use. How many rounds does the CZ DUTY 4.0 F hold? 17+1 with the standard magazine and 19+1 with the extended floor plate.