The SIG P365 was introduced eight years ago and quickly became a popular choice for concealed carry. While the original 10-shot 9mm version remains the most popular among several P365 variations, SIG has introduced a .380 ACP version.
Identical to the 9mm in exterior dimensions, the obvious question is why offer a .380 ACP version of a handgun already available in 9mm?
The answer basically comes down to recoil. A 9mm subcompact may be snappy for newer shooters. The .380 ACP is a popular minimalist cartridge, offering good feed reliability and reduced recoil. Though perceived as the least powerful self-defense cartridge, it has respectable wound ballistics while still being easy to handle.
SIG wasn’t alone in recognizing the appeal of the .380 ACP. The Glock 42, only incrementally smaller than the 9mm Glock 43, remains a popular self-defense handgun. Springfield followed with its Hellcat 9mm with a .380 ACP version as well. There is clearly a market for easier to shoot and operate handguns.
With modest recoil, reliable feeding and practical defensive capability, the .380 ACP is especially appealing to newer shooters and those who find small 9mm pistols difficult to control. The SIG P365 .380 combines those advantages with the same dimensions, capacity and carry-friendly profile that made the original P365 successful.
SIG P365 .380 Specifications
The SIG P365 has the same basic design and dimensions as the 9mm P365. It is a polymer-framed, striker-fired pistol. By using identical magazines with a spacer for the shorter cartridge, the .380 P365 maintains a 10-round capacity.
The slide is nicely contoured and fitted with SIGLITE night sights. Later options are also optics-ready. At 15.7 ounces, the .380 is marginally lighter than the 17.8-ounce 9mm version. In most applications, the difference in weight isn’t noticeable. The .380 ACP P365 fits standard P365 holsters.
Ergonomics are good. The pistol sits low in the hand and should fit most hands well. Trigger action is smooth with a clean break. The P365 is available with a manual safety or with no safety.
Action type: Semi-auto, single-action, striker-fired
Overall length: 5.8 inches
Overall height: 4.1 inches
Maximum width: 1.0 inches
Weight unloaded: 16.5 ounces
Weight loaded: 19.5 ounces
Slide: Stainless steel w/ black Nitron finish
Sight radius: 4.5 inches
Trigger pull weight: 5.8 pounds
Why Choose the P365 .380 Over the P365 9mm?
For many shooters, the biggest advantage of the P365 is not reduced weight but reduced recoil and easier operation.
While the .380 pistol is only slightly lighter than the 9mm pistol, slide retraction effort is approximately 2 pounds less. The lighter racking force makes this pistol attractive to new shooters or shooters with reduced hand strength.
Recoil is also noticeably lighter. The balance of power and control favors the .380 ACP, especially for those who find the 9mm unpleasant to shoot. The P365 .380 uses a locked-breech action rather than a straight-blowback action common in older handguns. Locked-breech operation helps absorb some recoil, contributing to the gun’s shootability.
This pistol is easy to shoot well and easy to enjoy shooting. My personal P365 .380 has more than 500 rounds through it and has never failed to feed, chamber, fire or eject.
The big question, though, is if the .380 ACP is enough for personal defense. The .380 ACP is not as powerful as the 9mm Luger. The available evidence and ballistic testing clearly show that the 9mm offers greater wound potential. However, a truism is power alone does not determine effectiveness. Accuracy may make up for power, while the reverse is seldom true.
Though not as strong as 9mm, the .380 ACP is a reasonable self-defense caliber. Shooters who struggle with recoil or if arthritis, injury or aging make controlling a subcompact 9mm difficult should choose the .380 ACP.
Ergonomics and Features
The SIG P365 .380 shares the same compact dimensions and slim profile that made the original P365 popular. The grip frame features a good balance of adhesion and comfort that is ideal for carrying concealed. A more abrasive material against your skin would be uncomfortable for all-day carry and wear excessively on pocket linings during pocket carry.
The smooth trigger action combined with the pistol’s moderate recoil make for a handgun that is easy to shoot well.
Sights and Optics-Ready Capability
The .380 P365 ships with SIGLITE tritium sights. The front sight draws your eye to the target. However, if this will be your everyday carry gun, I recommend adding a carry optic. I chose the RMSc from Shield Sights. This service-grade optic has excellent features and low mount. It was easy to install and zero.
Maintenance
The pistol field strips easily. After confirming the pistol is unloaded and locking the slide to the rear, the takedown lever is rotated and the slide removed from the frame. The recoil spring assembly lifts out, followed by the barrel.
Maintenance demands are minimal and the design is simple enough for routine cleaning and inspection.
Range Performance and Reliability
The pistol’s low recoil contributes to limited muzzle flip and razor sharp delivery. It was unusually easy to shoot well for a handgun of this size.
Adding the Shield RMSc optic made performance even more impressive. Firing with both eyes open, I was able to run through targets quickly, and the pistol proved superbly controllable.
SIG P365 .380 Accuracy
Accuracy outstrips most expectations of the .380 ACP handgun. Firing from a solid bench rest position at 15 yards, I was surprised to find that quality ammunition would put five shots into 2 inches or less. On one occasion, the pistol delivered a brilliant 1.5-inch group.
At 25 yards, the P365 will group five shots into less than 3 inches. That level of accuracy puts the pistol well above most pocket guns and should give shooters confidence at any personal-defense distance.
.380 ACP vs. 9mm Ballistics: Is the .380 ACP Enough for Self-Defense?
The important question is whether the .380 ACP is enough for personal defense. Like most handgun calibers, there are documented incidents in which the cartridge has worked and others in which it has failed.
Lab testing tells us the 9mm Luger is the superior cartridge. It offers greater wound potential and more power than the .380 ACP. The appeal of the .380 ACP is not raw power. It is light recoil, easier slide operation and better control for shooters who struggle with a subcompact 9mm. The .380 ACP does not require as strong a recoil spring, making the P365 .380 easier to rack than the 9mm version.
While the .380 ACP is not as strong as 9mm, it remains a reasonable personal-defense choice for some shooters.
To compare 9mm vs. .380 performance, I used ballistic gelatin testing. The results show the advantage of 9mm while also showing that quality .380 ACP loads offer useful performance.
.380 ACP Ballistic Results
| Load | Velocity | Penetration | Expansion |
| Black Hills Honey Badger 60-grain | 1,153 feet per second | 12 inches | .355 inch |
| Black Hills 90-grain | 889 feet per second | 12.5 inches | .42 inch |
| Buffalo Bore 80-grain Barnes X | 1,177 feet per second | 9.5 inches | .70 inch |
| Buffalo Bore 90-grain JHP | 990 feet per second | 10 inches | .60 inch |
| Buffalo Bore 90-grain JHP +P | 1,060 feet per second | 14 inches | .60 inch |
9mm Ballistic Results
| Load | Velocity | Penetration | Expansion |
| Black Hills 100-grain Honey Badger +P | 1,233 feet per second | 16 inches | .355 inch |
| Fiocchi 124-grain Covert X Hollow-Point | 1,060 feet per second | 14 inches | .60 inch |
| Hornady 135-grain Handgun Hunter | 1,140 feet per second | 20 inches | .56 inch |
Concealed Carry Considerations
For concealed carry, the P365 .380 benefits from the same size and shape that made the 9mm P365 so popular. It fits standard P365 holsters and holster availability is excellent.
I ordered the new Galco Hawkeye holster for my SIG P365. This is optics-ready premium leather holster is designed to accommodate subcompact handguns with optics. The optics shroud protects the optic from damage and aids in the draw. Dual belt loops cinch the holster and handgun solidly to the belt, providing an excellent balance of speed and weapon retention.
SIG P365 .380 Pros and Cons
The P365 .380 has a long list of advantages, including SIG’s well-known quality and reliability. The pistol is light, compact, accurate and reliable. The supplied SIGLITE sights are excellent, and optics-ready versions allow shooters to add a carry optic. The pistol is readily available, affordable and supported by plentiful holster options.
The drawbacks are all related to the caliber. The .380 ACP doesn’t have the wound potential of the 9mm Luger. Ammunition may also cost more than 9mm training ammunition and may be harder to find during shortages. Defensive loads are usually similar in price.
Who Is the SIG P365 .380 Best For?
The P365 .380 is especially appealing for shooters who want a modern handgun for concealed carry but find subcompact 9mm pistols too sharp in recoil or too difficult to operate.
It is a strong choice for new shooters, recoil-sensitive shooters and those dealing with arthritis, injury, aging or reduced hand strength. It also makes sense for someone who has used an older-generation .380 ACP and wants to move into a more modern carry pistol.
The 9mm P365 remains the more powerful option. The .380 version is for the shooter who values control, ease of operation and practical accuracy over maximum cartridge power.
Final Verdict
The SIG P365 .380 is a clean, reliable and easy-shooting handgun. It keeps the size, capacity and carry profile of the popular 9mm P365 while reducing recoil and slide effort.
The .380 ACP will never equal the 9mm Luger in wound potential. But the ability to control the handgun, rack the slide confidently and deliver accurate fire matters more than paper ballistics.
For those who need or prefer a low-recoil carry pistol, the SIG P365 .380 is one of the best.380 ACP handguns available. It is reliable, accurate, easy to carry and easy to shoot well.
