Description
The Sig Sauer P365X 9mm 3.10″ 10+1 Stainless/Black is a factory optic-ready micro-compact that bridges the gap between deep concealment and shootability. It pairs a 3.10″ carbon steel barrel with a stainless steel slide cut for direct mounting of popular red dots, all wrapped in a black polymer frame with an integrated carry contour. Two 10-round magazines ship in the box, and factory night sights provide immediate low-light reference. At $491.85, this is the P365 platform optimized for faster target acquisition without adding bulk.
| Manufacturer | Sig Sauer (per manufacturer specs) |
|---|---|
| Model | P365X |
| Material | Stainless steel slide, carbon steel barrel, polymer frame |
| Compatibility | Sig Sauer P365 holsters and magazines (P365X-specific holster recommended for optic-cut slide) |
| Finish | Stainless slide with black polymer frame |
| Weight | 17.8 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Factory Optic-Ready Slide – The stainless steel slide arrives pre-milled for direct mounting of popular micro red dots (Shield RMSc footprint). Why it matters: you can add a dot without sending the slide to a machine shop, saving time and money.
- X-Series Grip Module – The black polymer frame features an integrated carry contour and a flared magwell for faster reloads. Why it matters: this grip gives you more surface area for control than the original P365, reducing muzzle flip without printing more.
- Sig Sauer Night Sights – Tritium front and rear sights are standard, providing a three-dot glow in total darkness. Why it matters: if your dot fails or you don’t use an optic, you still have a reliable low-light aiming system.
- 10+1 Capacity with Flat Floorplate – Two 10-round magazines ship with the pistol, each designed for the X-series grip. Why it matters: you get full grip purchase with the flush-fit mag, and the extended basepad option offers an extra round while maintaining concealability.
- Striker-Fired Action with 3.10″ Barrel – The striker-fired trigger breaks clean at approximately 5.5 lbs, and the 3.10″ barrel balances accuracy with carry comfort. Why it matters: consistent trigger pull aids shot placement, and the barrel length is short enough for IWB carry but long enough for defensive accuracy.
Who It’s For
The P365X is built for everyday carriers who want a red dot on their micro-compact without paying for a custom cut. It suits shooters who found the original P365 grip too short for a full firing grip, and who prefer a flat trigger and integrated carry contour. If you carry appendix or strong-side IWB and prioritize concealment but still want a dot and night sights from the factory, this is your pistol.
Pros & Cons
- Pro: Optic-ready out of the box—no aftermarket milling needed.
- Pro: Night sights included, so you don’t have to upgrade immediately.
- Pro: 10+1 capacity in a package barely larger than a true subcompact.
- Con: The optic footprint is limited to Shield RMSc-pattern dots; larger optics (RMR, Holosun K) require an adapter plate or different slide.
Comparison
| Feature | Sig Sauer P365X | Glock 43X MOS | Smith & Wesson M&P9 Shield Plus Optics Ready |
|---|---|---|---|
| Barrel Length | 3.10″ | 3.41″ | 3.1″ |
| Capacity (std mag) | 10+1 | 10+1 | 10+1 (13+1 available) |
| Optic Ready | Yes (RMSc footprint) | Yes (MOS, uses adapter plates) | Yes (C.O.R.E. system, includes plates) |
| Weight (unloaded) | 17.8 oz | 18.7 oz | 20.2 oz |
| Night Sights | Yes (tritium) | No (plastic sights standard) | No (white dot, tritium optional) |
| Trigger | Flat, 5.5 lb | Curved, 5.5 lb | Flat, 5.5 lb |
| Street Price (approx) | $491.85 | $530–$580 | $460–$510 |
FAQ
Does the P365X come with a red dot optic?
No. The slide is pre-milled for direct mounting of Shield RMSc-pattern micro red dots, but no optic is included. You can add your own dot (e.g., Holosun 407K/507K, Sig Romeo Zero) without any adapter plate.
What magazines does the P365X use?
It uses P365X-specific 10-round magazines with a flat floorplate. Standard P365 10-round magazines will work but leave a gap at the bottom of the grip. P365XL 12-round magazines are also compatible and extend the grip slightly.
Is the P365X compatible with standard P365 holsters?
Yes, most P365 holsters will retain the P365X, but the optic-cut slide may require an open-top or optic-compatible holster. For a perfect fit, look for holsters specifically listed for P365X or P365 with optic cut.
What is the trigger pull weight on the P365X?
Per Sig Sauer specs, the striker-fired trigger breaks at approximately 5.5 lbs with a short reset. The flat trigger shoe is standard on X-series models.
Can I use a suppressor on the P365X?
No. The 3.10″ barrel is not threaded, and the slide is not designed for suppressor-height sights beyond the included night sights. If you need a threaded barrel, consider the P365X with an aftermarket barrel or the P365-XL.
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Explore more semi-auto handguns or check our micro-compact pistols and Sig Sauer firearms.
Last updated: April 2026
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