Experience the ultimate in customized control and compact firepower.
Experience the ultimate in customized control and compact firepower.


Full-size capability and micro-compact concealability combine with the all-new FUSE from SIG SAUER. Its 21+1 capacity meets a razor-thin 1” wide grip module for unmatched versatility and shootability. FUSE delivers the accuracy and grit of a full-size pistol with its 8” optic-ready slide, longer than any micro-compact in its class for improved sight radius and enhanced control. Equipped with fiber optic sights and a 4.3” barrel, FUSE provides improved ballistic performance for faster velocities and maximum expansion on target.
Engineered for precision, the P365-FUSE boasts features that enhance shooter accuracy. The optic-ready slide, compatible with the Compact footprint and Compact SIG-LOC red dots, allows for the easy mounting of a red dot sight for faster target acquisition. Its 4.3” carbon steel barrel and an extended 7.2” slide improve the sight radius, contributing to greater stability and precision. The pistol is equipped with a fiber-optic front sight and a black serrated rear sight, providing a clear sight picture in various lighting conditions. For those seeking immediate advanced sighting solutions, specific models are available with a ROMEO-X COMPACT or ROMEO-RS sight pre-installed.
The P365-FUSE is crafted for comfort and control, featuring a laser-engraved LXG grip module that ensures a secure hold. To accommodate a variety of hand sizes, the pistol includes interchangeable small, medium, and large backstraps, allowing for a customized fit. The aggressive serrations on the slide provide a positive grip for easy manipulation, even in adverse conditions. The slim, 1-inch wide grip profile makes it highly concealable, while the nickel-plated flat-faced trigger offers a smooth and consistent pull. An M1913 accessory rail and a removable magwell further enhance its versatility and performance.
| Feature | Specification |
| Caliber |
9mm Luger
|
| Capacity |
(2) 21rd / (1) 17rd Steel Mag
|
| Barrel Length |
4.3 in [109.22 mm]
|
| Overall Length |
7.2 in [183 mm]
|
| Weight |
23.1 oz [654.9 g]
|
The P365-FUSE is engineered for those who demand the best in personal defense. Its compact size ensures easy concealment, while its high-capacity magazine provides ample firepower. The modular frame allows for customization, and the accessory rail enables the attachment of lights or lasers. With its superior accuracy and ergonomic design, the P365-FUSE offers unmatched performance in a compact package.
Are you ready to take your everyday carry to the next level? Phil Strader, Director of Operations at the SIG SAUER Academy, introduces the P365-FUSE. Its full-size capability and micro-compact concealability combine with the all-new FUSE from SIG SAUER. Its 21+1 capacity meets a razor-thin 1” wide grip module for unmatched versatility and shootability. FUSE delivers the accuracy and grit of a full-size pistol with its 8” optic-ready slide, longer than any micro-compact in its class for improved sight radius and enhanced control. Equipped with fiber optic sights and a 4.3” barrel, FUSE provides improved ballistic performance for faster velocities and maximum expansion on target.
Accessories & Compatabilities
Customers in the following states are NOT eligible to participate in the Custom Works Concierge Service; Massachusetts, California, Washington DC.
You will receive an email within approximately 15 minutes with further instructions regarding your build confirmation, payment, and the other steps in the process of getting your Custom Works firearm.
Credit Card information is submitted on the checkout page of your Custom Works build and charged within 24 business hours of submission. Changes made after the order is submitted is not permitted.
The estimated production time for our Custom Works build team is 4-6 weeks.
We do not engrave customer-owned SIG pistols through this program. Engraving is offered via the purchase of new Custom Works Concierge P320 Pistols.
A Custom Works Representative can work with you to identify an FFL within a reasonable distance of your location. Please call the Concierge line for help before submitting your order. 603-610-3000 option 7
Please call or email Custom Works as soon as possible 603-610-3000 option 7
Please call or email Custom Works as soon as possible about your order. 603-610-3000 option 7
Do not shoot the firearm with an optic that isn’t properly mounted or has a broken mounting screw. Contact Customer Service immediately for a replacement part.
Please see the Custom Works Concierge Service return policy here.
We cannot change an order once it is booked. If you have any questions about your P320 build, please call a Custom Works Representative BEFORE placing your order and they can help
We cannot change an order once it is booked. Please call a Custom Works Representative if you have further questions. 1-603-610-3000 option 7
No, promo/coupon codes are not applicable to the Custom Works Concierge Program.
All Custom Works Concierge pistols will come with (3) three magazines of the selection you choose from the configurator.
We are building in 9mm only.
No, not all slides can be engraved at this time.
No
We are only engraving text in English, and symbols that appear on a standard QWERTY keyboard. Accents, different alphabets, symbols, emojis, etc. are not being engraved at this time.