Description
The SIG 365XF9BFOMS P365 9mm 4.3 17R OR BLK is a factory-compact pistol that splits the difference between concealability and shootability. It gives you a 4.3-inch barrel, a 17-round magazine, and an optics-ready slide, all in a black finish. At $799.99, this is the model to grab if you want more barrel length and capacity without stepping up to a full-size frame.
| Manufacturer | Sig Sauer |
|---|---|
| Model | P365XF9BFOMS (P365 X-Macro Comp) |
| Material | Stainless steel slide, polymer grip module (per manufacturer specs) |
| Compatibility | Sig P365 family holsters and magazines |
| Finish | Black Nitron |
| Weight | 20.5 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- 4.3-inch barrel — Adds velocity and sight radius over the standard P365, making it easier to shoot accurately at distance.
- 17-round flush-fit magazine — You get duty-grade capacity in a grip that still conceals under a t-shirt.
- Optics-ready slide — Cut for the Romeo Zero and other micro red dots, so you can upgrade to a dot without milling.
- Flat trigger — Reduces trigger reach and gives a consistent break, which helps new shooters and experienced hands alike.
- X-Macro grip module — The textured frame with a built-in compensator cuts muzzle rise and gives you a full-hand purchase.
Who It’s For
This SIG P365 X-Macro Comp is for anyone who wants a high-capacity 9mm that still fits in a compact holster. It works for concealed carry, home defense, and range use. New gun owners will appreciate the low recoil and easy slide manipulation. Experienced shooters will like the optics-ready slide and flat trigger.
Pros & Cons
- Pro: 17+1 capacity in a grip that’s barely larger than a standard P365.
- Pro: Factory-compensated slide reduces felt recoil by about 15% compared to a standard P365 (per Sig Sauer specs).
- Con: The integrated compensator can be harder to clean if you shoot dirty ammo — expect to scrub the ports.
Comparison
| Feature | Sig P365 X-Macro Comp | Zev Technologies OZ9C | Agency Arms AOS G19 |
|---|---|---|---|
| Barrel Length | 4.3 in | 4.0 in | 4.02 in |
| Capacity | 17+1 | 15+1 | 15+1 |
| Optics Ready | Yes (RMSc pattern) | Yes (RMR pattern) | Yes (Agency AOS system) |
| Weight | 20.5 oz | 24.5 oz | 22.0 oz |
| Price | $799.99 | $1,299.00 | $1,195.00 |
| Best For | Concealed carry with high capacity | Competition and custom builds | Duty use and precision shooting |
FAQ
What holsters fit the P365 X-Macro Comp with the 4.3-inch barrel?
Most P365 X-Macro holsters will work, but make sure the holster is molded for the longer slide. The integrated compensator adds about 0.3 inches of length over a standard X-Macro. Check with the holster maker for compatibility before buying.
Can I use standard P365 magazines in this gun?
Yes, standard P365 magazines will work, but they will sit flush with the grip module. You can use 10-round, 12-round, or 15-round mags if you want a lower capacity for deep concealment or restricted states.
Is the optic cut compatible with Trijicon RMR or Holosun 507K?
The slide is cut for the Sig Romeo Zero and other RMSc-footprint optics. For a Holosun 507K or EPS Carry, you need an adapter plate. The RMR footprint is too large for this slide without custom milling.
Does the compensator affect reliability with defensive ammunition?
Per Sig Sauer, the integrated compensator is tuned for 124-grain NATO-pressure ammunition. It runs reliably with most 115-grain and 124-grain defensive loads. Light 115-grain target ammo may fail to cycle in cold weather. Stick with 124-grain for carry.
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Explore more: Semi Auto Handguns | Sig Sauer | Concealed Carry
Last updated: April 2026
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