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The P365X RXSL takes everything that made the original P365 a phenomenon in the carry world and steps it up considerably. The X-Series grip module gives you a fuller, more ergonomic purchase on the gun compared to the standard P365, with an integrated mag funnel and extended beavertail that lets you get a high, consistent grip without worrying about slide bite. The 3.1-inch carbon steel barrel keeps the overall length to just 5.8 inches, and the whole package weighs in at 18 ounces with a magazine. That is a lot of pistol in a very small envelope.
The defining feature of this specific model is the Romeo-X SIG-LOC Compact optic. SIG-LOC stands for Leverage Optimized Connection, and it is a mounting system that uses five points of contact between the optic and the slide rather than the two or three screws you see on most standard pistol optic cuts. That extra lockup matters on a carry gun, where the optic takes a beating from holstering, drawing, and recoil hundreds or thousands of times. The Romeo-X itself is built from 7075 aluminum with a fully sealed optical system, a side-loading CR1632 battery you can swap without losing zero, and SIG's MOTAC motion-activated illumination that wakes the dot up the moment the gun moves. The circle-dot reticle gives you a 2 MOA center dot for precise shots and a 32 MOA outer ring for fast close-range target acquisition. The deck height sits low enough for absolute co-witness with the XRAY3 Day/Night front sight, so your irons are still usable if needed.
The flat X-Series trigger breaks cleanly at 90 degrees and maintains the crisp, short reset the P365 platform is known for. It is a meaningful improvement over many striker-fired triggers in this size class, and it contributes to the gun's reputation for being genuinely shootable despite its compact dimensions.
Holster selection is straightforward since the P365X has a huge aftermarket, but make sure you pick up a holster with an optic cut given the mounted Romeo-X. The SIG rail under the barrel is compatible with SIG's Foxtrot and Lima accessories, and the modular chassis design means grip modules and slides are swappable down the road. This model ships with two 10-round steel magazines. If your situation allows for higher capacity magazines, the P365X is also compatible with 12, 15, 17, and 21-round P365 family magazines.
SIG mounts and zeros the Romeo-X SIG-LOC Compact at the factory before the gun ships, so you are not starting from scratch. That said, it is always a good idea to verify and confirm zero at the range with your preferred carry ammunition, since shipping and handling can introduce minor shifts. Zeroing the Romeo-X is straightforward, with tactile 1 MOA click adjustments that are easy to dial in.
The P365X has one of the largest holster ecosystems in the compact carry market, but you specifically need a holster with an optic cut to accommodate the Romeo-X. Major kydex makers like Alien Gear, Vedder, CYA Supply, and Safariland all make P365X holsters with optic-compatible cuts. Always double-check that the listing specifies optic compatibility before ordering.
Yes, the P365X is compatible with the full range of P365 family magazines, including 10, 12, 15, 17, and 21-round options. The grip module is longer than the original P365, so 10-round magazines will sit flush while higher-capacity options extend below the grip. Note that P365 XMACRO magazines are not compatible with this model.
SIG-LOC (Leverage Optimized Connection) is SIG's proprietary bottom-mount optic attachment system that creates five points of contact between the slide and the optic body. Most standard pistol optic cuts rely on two screws from above, which can loosen over time from recoil and daily carry. The SIG-LOC design reduces zero shift significantly under hard use, which is a real-world advantage for a gun you are depending on.
No, this specific model does not include a manual thumb safety. The P365X platform is available in both safety and no-safety configurations, but the 365X-9-BXR3-RXSL-10 ships without one. The striker-fired action includes internal safeties, and many carry-focused owners prefer skipping the manual safety for a cleaner, faster draw.
Both the pistol and the Romeo-X optic are covered under SIG's Infinite Guarantee, which is fully transferable and requires no receipts or warranty cards. That warranty coverage extends to the original owner as well as any subsequent owners, which is one of the more notable perks of buying SIG products.
| UPC | 798681720286 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 365X-9-BXR3-RXSL-10 |
| Action | |
| Barrel Length | 3.1" |
| Caliber/Gauge | 9mm |
| Capacity | 10 |
| Color | Black |
| Model | |
| Product Type | Striker Fired |
| Safety | Manual |
| Sights | Night Sights |
| Slide Description | Serrated w/Optic |
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