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.

Pick the C when the gun has to disappear under a cover garment. It gives up two rounds to the full-size model (15+1 against 17+1) and about 8 mm of grip height, and in return it is 5.3 in (135 mm) tall and 27.2 oz (770 g) light.

The chassis is serialized and modular, which is CZ's way of making the polymer grip swappable. The frame itself is fiberglass-reinforced polymer, 1.3 in (33 mm) wide, on a 102 mm barrel and a 7.4 in (188 mm) overall length. The SFDA trigger breaks at 25 ± 4 N (5.6 ± 0.9 lbs) and resets in 0.16 in (4 mm). Optics mount directly to the slide; the photos from CZ show Holosun, Aimpoint and Shield footprints.

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.

Who is it for: concealed carry where your state allows it, home defense, and range time that does not need a full-size grip. 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.

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 No. Missouri repealed its permit to acquire in 2007 and has no waiting period.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. Does the CZ DUTY 4.0 C take CZ P-10 magazines? CZ lists the DUTY with its own 15-round magazine and an extended floor plate for 17+1. P-10 magazine fit is not confirmed, so plan on DUTY magazines.