Showcased to the European public at the 2025 edition of IWA, the Smith & Wesson CSX E-Series 9mm Luger semi-automatic pistols expand the American company's already vast catalog of defense-oriented compact and subcompact pistols.

Two variants are available: the CSX E-Series 3.1 – 154 mm / 6.1" long overall, featuring a 7,8 cm / 3.1" barrel – and the slightly longer CSX E-Series 3.6, featuring a 9,1 cm / 3.6" barrel and standing at 167 mm / 6.6" in overall length. All barrels are manufactured out of stainless steel, featuring a 1:10" twist rate and a full Armornite finish; all other features are substantially identical, including the improved E-Series external hammer-fired single-action trigger with a straighter pull, a clean break, and improved reset.

The machined steel slide of the CSX E-Series pistols is optics-ready and will accept Shield RMSc and Holosun 507K footprint micro red dot sights; the machined lightweight aluminum alloy slide features an ambidextrous slide stop and manual safety, and a modular design grip whose interchangeable polymer backstrap allows length adjustment to fit any hand size as well as 10, 12, 15 or 17-rounds double-stack magazines.