Description
The original CSX earned a loyal following as one of the few hammer-fired, all-metal micro nines on the market, and the E-Series is Smith & Wesson listening to what owners asked for. The bones are the same: an aluminum alloy frame, a 3.1 inch stainless steel barrel with a 1:10 twist, and a crisp single action design that gives you a trigger most striker guns can't touch. What's new is where it counts. The E-Series trigger breaks cleaner with a shorter, more positive reset, the grip texture now covers more real estate for a surer hold with sweaty hands, and the slide is cut for optics right from the factory.
An Optic-Ready CSX Built for Real Carry
The slide uses a modified RMSc/507K footprint, so it accepts most of the popular micro red dots without hunting down adapter plates. Smith & Wesson also added their ClearSight cut, which routes gasses away from the optic lens to help keep your glass cleaner through a range session. If you'd rather run irons, the metal white dot sights are ready to go out of the box, and the serrated slide gives you solid purchase for press checks and reloads.
One Pistol, Two Grip Sizes
This is the feature that sets the E-Series apart from most micro-compacts. The included modular grip adapter lets you configure the frame two ways: keep it trimmed down with the flush-fit 10-round magazine for the deepest concealment, or install the longer adapter and extended 10-rounder for a fuller grip that tames recoil and speeds up follow-up shots. Both magazines come in the box, so you're set up for either job on day one.
Why the CSX E-Series Earns a Spot in the Rotation
At roughly 20 ounces with an ambidextrous thumb safety and ambi controls, this pistol suits left- and right-handed carriers alike. The Armornite finish on the barrel and slide shrugs off holster wear and daily handling. For anyone who prefers the crisp pull of a hammer-fired single action over the mushy triggers common in this size class, the CSX E-Series makes a strong case.
Key Specifications
- Manufacturer Part Number: 13956
- UPC: 022188898828
- Model: CSX E-Series
- Caliber: 9mm Luger
- Action: Single Action, Hammer-Fired
- Barrel Length: 3.1" Stainless Steel, 1:10 Twist
- Capacity: 10+1 Rounds
- Frame: Aluminum Alloy, Flat Black
- Slide: Stainless Steel, Armornite Finish, Serrated
- Optic Cut: Modified RMSc/507K Footprint with ClearSight Cut
- Sights: Metal White Dot
- Safety: Ambidextrous Thumb Safety
- Weight: Approx. 19.7 oz
- Color: Black
What’s Included
- Smith & Wesson CSX E-Series 9mm pistol
- 10-round flush-fit magazine
- 10-round extended magazine
- Longer modular grip adapter
- Owner's manual
Frequently Asked Questions
What red dots fit the CSX E-Series optic cut?
The slide is machined with a modified RMSc/507K footprint, which covers most of the popular micro optics like the Holosun 507K and Shield RMSc pattern dots. Smith & Wesson's ClearSight cut also helps divert gasses away from the lens when firing. Always confirm your specific optic's footprint before mounting, since some dots need slightly different screw patterns.
What's the difference between the CSX E-Series and the original CSX?
The E-Series keeps the aluminum frame and hammer-fired single action design but adds an optics-ready slide, an improved E-Series trigger with a cleaner break and shorter reset, and more aggressive grip texture. It also comes with a modular grip adapter that converts the frame from micro-compact to compact size. Think of it as the same proven platform with the most requested upgrades built in.
How does the modular grip adapter work on this pistol?
The CSX E-Series ships with a longer grip adapter that pairs with the included extended 10-round magazine. Run the flush-fit mag with the standard setup for maximum concealment, or install the adapter and extended mag when you want a fuller grip at the range or for better recoil control. Swapping between configurations is quick and requires no gunsmithing.
Is the CSX E-Series good for left-handed carriers?
Yes, it's one of the more lefty-friendly micro nines out there. It features an ambidextrous manual thumb safety along with ambidextrous controls carried over from the original CSX design. Southpaws can run this pistol without workarounds or aftermarket parts.





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