SIG P365 Fuse | Unboxing & Overview

Published on April 14, 2026
Duration: 8:07

This video provides an unboxing and initial overview of the Sig Sauer P365 Fuse. It highlights the modularity of the P365 fire control unit, which can be swapped into different P365 frames, including the P365 Flux chassis. The presenter also details included accessories like extra fiber optic sights, Sig Lock Loc pins for optics, and multiple magazine capacities (17 and 21 rounds), comparing it to a P365X Macro.

Quick Summary

The Sig P365 Fuse is highly modular due to its P365 fire control unit (FCU) being the serialized part, allowing it to be swapped into various P365 frames like the Flux chassis. It includes 17 and 21-round magazines and features an RMSC footprint optic cut with optional Sig Lock Loc pins for Sig Sauer optics.

Chapters

  1. 00:00Introduction and Unboxing
  2. 00:32SIG Box Contents
  3. 01:09Included Literature and Accessories
  4. 01:32Dawson Precision Fiber Optics
  5. 01:49Sig Lock Loc Optic System
  6. 02:27Backstraps and Coin
  7. 02:37The P365 Fuse Firearm
  8. 02:42Magazine Palooza: 17 & 21 Round Mags
  9. 03:15P365 Fuse Overview
  10. 03:22Modular Fire Control Unit
  11. 03:43P365 Flux Chassis Compatibility
  12. 04:15Slide Features: Serrations & Optic Cut
  13. 04:33Picatinny Rail Limitations
  14. 05:04Trigger Pull Test
  15. 06:01Comparison to P365X Macro Comp
  16. 06:43Backstrap Swapping Demo
  17. 07:08P365 Platform Modularity
  18. 07:25Comp Version Mentioned
  19. 07:40Restoring Original Configuration
  20. 07:48Conclusion and Call to Action

Frequently Asked Questions

What makes the Sig P365 Fuse modular?

The Sig P365 Fuse is modular because its serialized component is the fire control unit (FCU), which is part of the P365 platform. This allows the FCU to be easily removed and swapped into different P365 frames, such as the P365 XL or the P365 Flux chassis.

What types of magazines are included with the Sig P365 Fuse?

The Sig P365 Fuse comes with a variety of magazines. It includes flush-fitting 17-round magazines and also two 21-round magazines, offering significant capacity for a pistol of its size.

What optic mounting features does the Sig P365 Fuse have?

The Sig P365 Fuse features an optic cut with an RMSC footprint, compatible with many micro-compact red dot sights. It also includes Sig Lock Loc pins, specifically designed to enhance the secure mounting of Sig Sauer optics like the Romeo X series.

Can you mount a full-size pistol light on the Sig P365 Fuse?

The Sig P365 Fuse has a standard Picatinny rail suitable for compact lights like the TLR8 or TLR7 Sub. However, the rail appears to be too short to accommodate full-size pistol lights such as the SureFire X300 or larger TLR models.

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