SIG Sauer P365-FUSE Comp | 9mm | 3.7" | Optic Ready | 21rd Pistol

Taking micro-compact capacity and long-slide performance to the absolute limit, the Sig Sauer P365 Fuse Comp (MPN: 365XF-9-COMP) bridges the gap between full-sized shootability and slim, concealable carry. Designed for maximum velocity, sight radius, and recoil reduction, the P365 Fuse Comp delivers unmatched firepower with 17+1 and 21+1 round capacity out of the box.

Integrally Compensated Long-Slide Design

The P365 Fuse Comp pairs a 4.3-inch carbon steel barrel with a factory-engineered, top-ported expansion chamber built directly into the stainless steel slide. By venting high-pressure propellant gases upward before bullet exit, the integrated compensator significantly flattains muzzle flip and reduces perceived recoil—allowing for rapid target re-acquisition and faster follow-up shots without adding the length or maintenance hassle of a threaded barrel.

Enhanced LXG Grip Module & Unrivaled Capacity

Built on Sig's modular Fire Control Unit (FCU), the Fuse feature set includes an upgraded LXG (Laser-X Series) textured grip module. Featuring aggressive laser-engraved stippling across all contact surfaces, a full-length 1913 Picatinny rail for tactical lights, and an integrated flared magwell for lightning-fast reloads, the grip gives shooters full-hand control while keeping the slide profile micro-slim at just 1.1 inches wide. The pistol ships with one 17-round flush-fit steel magazine and two extended 21-round steel magazines.

Optic-Ready Slide & High-Visibility Sights

Outfitted for instant target acquisition, the P365 Fuse Comp comes standard with a fiber optic front sight and a blacked-out, serrated rear sight. The slide features an optic cut built for direct mounting micro red dots utilizing the Compact / Shield RMSc footprint (such as the Sig Sauer ROMEO-X Compact, Holosun 407K/507K, and EPS Carry) without requiring adapter plates.