Full-size capability and micro-compact concealment 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 6 7/8” optic-ready slide, longer than any compact in its class for improved sight radius and enhanced control. Equipped with a fiber optic front sight and a 4.3” barrel, FUSE provides improved ballistic performance from today’s defensive ammunition for faster velocities and maximum expansion on target.

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SIG SAUER P365 FUSE 9MM 4.3” 21RD PISTOL, BLACK – 365XF-9-BFO

Overview

The SIG SAUER P365 FUSE 9MM 4.3” 21RD PISTOL, BLACK – 365XF-9-BFO represents the perfect fusion of power, performance, and precision engineering. As a revolutionary addition to SIG SAUER’s elite P365 series, this pistol is designed to deliver duty-grade performance in a compact footprint, offering unmatched versatility for concealed carry, home defense, tactical use, and range shooting.

With a 4.3-inch barrel, enhanced XSeries grip module, and a massive 21-round capacity, the P365 FUSE goes far beyond traditional micro-compact pistols. Whether you’re a seasoned shooter, tactical operator, or responsible citizen looking for premium protection, the P365 FUSE offers everything you need in a sleek, reliable, and optics-ready platform.

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Key Features of the SIG SAUER P365 FUSE 9MM

• Caliber: 9mm Luger

• Barrel Length: 4.3 inches – delivering enhanced accuracy

• Magazine Capacity: 21+1 rounds

• Overall Length: 7.5 inches

• Slide: Optics-ready with serrations for better manipulation

• Grip Module: XSeries grip with ergonomic design

• Frame Finish: Hardcoat anodized

• Slide Finish: Nitron

• Sights: X-RAY3 Day/Night sights (optics-compatible)

• Trigger: XSeries flat-faced trigger

• Weight: Approx. 25.5 oz

• Accessory Rail: M1913 Picatinny

• SKU: 365XF-9-BFO

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Performance Meets Practicality

The P365 FUSE is built for those who demand maximum firepower without compromising concealability. The 21-round capacity makes it one of the highest-capacity micro-compacts on the market, allowing you to carry more rounds than many full-sized pistols. Whether you’re on the range or in a real-life defensive scenario, this pistol ensures you never come up short.

The 4.3” barrel offers improved ballistic performance and accuracy over the standard P365. It’s the ideal size for those who want enhanced control and smoother shooting with every trigger pull.

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XSeries Ergonomics

The SIG SAUER P365 FUSE features the popular XSeries grip module, known for its incredible ergonomics, undercut trigger guard, and extended beavertail. This grip design provides superior control, natural pointing, and reduced recoil management — especially when firing rapidly or under stress.

Whether you have larger or smaller hands, the P365 FUSE provides a comfortable and secure hold that ensures better accuracy and reduced fatigue. The XSeries grip texture also enhances traction, keeping your grip firm even when your hands are sweaty, gloved, or wet.

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Optics-Ready Platform

Modern shooters demand modern solutions. That’s why the P365 FUSE features a factory-cut slide that allows you to directly mount your favorite micro red dot optics, such as the SIG ROMEOZero, Holosun 507K, or Shield RMS. This makes target acquisition lightning fast and follow-up shots more accurate than ever.

Paired with X-RAY3 Day/Night sights, the FUSE gives you a backup aiming solution that works seamlessly in low-light environments, bright conditions, and everything in between.

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Exceptional Trigger

Another standout feature is the flat XSeries trigger. This refined trigger offers a clean break, short reset, and flat face to encourage straight-back trigger pulls. It’s responsive, predictable, and ideal for both new and experienced shooters. Combined with SIG’s legendary striker-fired system, the trigger feel is crisp, consistent, and confidence-inspiring.

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Carry-Ready Durability

The SIG P365 FUSE is built with real-world conditions in mind. The hardcoat anodized frame and Nitron slide finish provide superior corrosion resistance and surface durability. Whether you’re carrying it daily, storing it in a holster, or exposing it to dust, moisture, or sweat, the P365 FUSE will hold up under pressure.

The internal components are engineered for long-term reliability, ensuring thousands of rounds downrange without compromising on performance. This isn’t just a pistol for today—it’s a pistol built to last for a lifetime.

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Loaded with Firepower: 21+1 Capacity

A true game-changer in the world of concealed carry pistols, the SIG P365 FUSE offers a staggering 21-round magazine (with one in the chamber). This gives you a total of 22 rounds on tap, outclassing almost every other compact or subcompact pistol on the market.

Why settle for 10, 12, or even 15 rounds when you can carry nearly double that? Whether you’re facing multiple threats or want to train longer at the range without constant reloads, the P365 FUSE delivers.

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Modular System & Aftermarket Support

As part of the P365 family, the FUSE benefits from SIG’s modular fire control unit (FCU). This serialized chassis allows users to swap slides, frames, barrels, and grip modules, turning one pistol into many.

Plus, the aftermarket support for the P365 platform is massive—from holsters and triggers to extended mags and optic mounts, you can fully customize your FUSE to match your shooting style or mission requirements.

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Concealed Carry, Range & Duty Use

• Concealed Carry: Despite its higher capacity and longer barrel, the P365 FUSE is still concealable with the right holster and clothing. The slim profile and ergonomic grip make it ideal for IWB (Inside Waistband) carry.

• Home Defense: With a full 21+1 capacity and optics-ready slide, it’s a fantastic choice for home protection. Add a weapon light and you’re ready for low-light defensive encounters.

• Range/Training: The longer slide and enhanced grip allow for smoother shooting, better accuracy, and less felt recoil—ideal for extended range sessions or competitive practice.

• Duty/Backup Gun: For law enforcement or private security, the P365 FUSE provides a powerful, compact option that offers more rounds in a smaller footprint than traditional duty pistols.

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Who Should Buy the SIG P365 FUSE 9MM?

This pistol is ideal for:

• Everyday carriers looking for maximum capacity

• Tactical users needing a compact yet powerful backup firearm

• Home defenders who want reliability, accuracy, and optics compatibility

• Range enthusiasts seeking superior performance in a micro-compact size

• First-time buyers wanting an all-in-one pistol they won’t outgrow

• Collectors interested in the evolution of the P365 line

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Why Choose SIG SAUER?

SIG SAUER is one of the most trusted names in the firearms industry—used by military, law enforcement, and civilian shooters worldwide. Their commitment to innovation, quality control, and performance under pressure is unmatched.

When you buy a SIG, you’re not just getting a firearm—you’re getting decades of research, elite craftsmanship, and battle-proven reliability.

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Final Thoughts: The Ultimate Evolution of the P365 Line

The SIG SAUER P365 FUSE 9MM 4.3” 21RD PISTOL, BLACK – 365XF-9-BFO is the answer for those who want everything in one handgun. It offers the capacity of a duty pistol, the accuracy of a full-size, and the concealability of a compact. Whether you’re stepping up from a smaller P365 model or choosing your first handgun, the FUSE is an elite performer in every category.

For shooters who refuse to compromise, the SIG SAUER P365 FUSE is your fuse to light the fire of superior protection, precision, and preparedness. SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MM SIG SAUER P365 FUSE 9MMsig sauer p365