Description
The Sig Sauer P365 380 ACP answers a question the rest of the P365 line does not. The .380 is the cartridge people reach for when recoil is the limiting factor, and for years that meant accepting a pistol that was hard to shoot well. The Sig Sauer P365 380 ACP takes the opposite route. It puts the .380 into the full P365 chassis, with a real grip, real sights and an optic-ready slide, so the lighter cartridge buys you comfort instead of costing you control.
Why the Sig Sauer P365 380 ACP Exists
Recoil and slide force are the two things that stop people shooting. A lighter cartridge softens the first, and the Sig Sauer P365 380 ACP also runs a lighter recoil spring than its 9mm sibling, which makes racking the slide markedly easier. For shooters with hand strength limitations, arthritis, or an injury, that second point often matters more than the first. This is the pistol that keeps people shooting when a 9mm has become a struggle.
At 15.7 ounces the Sig Sauer P365 380 ACP is also the lightest gun in the family. Carried all day, that difference is real, and the flush ten-round magazine keeps the grip short enough to hide under a shirt without a cover garment doing all the work.
Sights and Optics on the Sig Sauer P365 380 ACP
SIGLITE night sights are fitted front and rear, dovetailed so they can be changed or drifted for windage. They are tritium, so they work in the light conditions where most defensive encounters actually happen. The slide on the Sig Sauer P365 380 ACP is also cut for a micro red dot in the ROMEO-X Compact pattern, which means you can add a dot later without sending the gun out for milling.
That combination matters on a small pistol more than on a large one. A short sight radius punishes sloppy alignment, and a dot removes the alignment problem entirely. Buying the Sig Sauer P365 380 ACP optic-ready costs nothing up front and leaves the upgrade open.
Magazines and Controls
Two ten-round steel magazines ship in the case, one flush-fitting and one with an extended floorplate. The flush magazine is the concealment option; the extended one gives your little finger somewhere to go on the range. The trigger is the standard curved striker unit, and this configuration has no manual thumb safety, so the Sig Sauer P365 380 ACP comes up and fires with nothing to disengage.
Sig Sauer P365 380 ACP Specifications
| Caliber | .380 ACP (380 Auto) |
|---|---|
| Capacity | 10+1 rounds, two 10-round steel magazines (one flush, one extended) |
| Barrel Length | 3.1 in. |
| Overall Length | 5.8 in. |
| Height | 4.2 in. |
| Width | 1.0 in. |
| Weight | 15.7 oz. |
| Sight Radius | 4.9 in. |
| Sights | SIGLITE tritium night sights, dovetailed front and rear |
| Optic Cut | ROMEO-X Compact pattern, optic ready |
| Slide | Nitron-finished stainless |
| Grip Module | Modular polymer, P365 pattern |
| Trigger | Curved striker fired |
| Safety | No manual safety on this configuration |
| Rail | SIG rail |
| Part Number | 365-380-BSS |
| UPC | 798681640157 |

Why Shooters Pick This One
- Softer recoil and a noticeably easier slide to rack
- Lightest pistol in the P365 family at 15.7 ounces
- SIGLITE tritium night sights fitted from the factory
- Optic-ready slide, so a dot is a later choice rather than a lost one
- Two magazines, one flush and one extended, in the case
- Same holster footprint and manual of arms as the 9mm P365
Who the Sig Sauer P365 380 ACP Is For
This is the pistol for the shooter whose limiting factor is not willingness but grip strength or recoil tolerance. It is also a sensible first handgun, because a gun that is pleasant to shoot gets shot, and rounds downrange are what build competence. And for anyone already carrying a 9mm P365, the Sig Sauer P365 380 ACP shares the holster and the manual of arms, so it slots in as a lighter-carry option without relearning anything.
A .380 asks more of your ammunition choice than a 9mm does, so pair the Sig Sauer P365 380 ACP with a modern defensive load designed to expand at .380 velocities rather than a bulk practice round.
The manual-safety and coloured versions of this pistol are listed in our handgun catalog. Factory specifications are published on the SIG SAUER product page.
Every Sig Sauer P365 380 ACP sold by MAG5 Firearms ships new in the factory case with two magazines and the accessories SIG includes, and transfers to your chosen FFL. The Sig Sauer P365 380 ACP is a regulated firearm and we verify licensing before any order leaves the shop.








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