Icarus Precision A.C.E. P365-FUSE IWB Holster

Inside Waistband Holster for Sig Sauer 

P365-FUSE with Icarus Precision Grip Modules

Note:  Icarus Precision supporting holsters are not returnable for anything other than quality or workmanship issues. They are specialty items for Icarus Precision Grip Modules used with factory slides, which impact fit and function of the holster. We do not guarantee fitment with aftermarket slides or other components.

Grip Module Compatibility (Start Here)

This holster is specifically designed for use with the Icarus Precision A.C.E. “X” MACRO, FUSE MACRO or FUSE EVO grip module. Proper fit and retention depend on this exact configuration.

Explore available grip module options from Icarus Precision:

Icarus Precision A.C.E. 365 “X” MACRO

Icarus Precision A.C.E. 365 "FUSE" EVO

Icarus Precision A.C.E.. 365 "FUSE" MACRO

• Only compatible with Icarus grip modules listed above
• Not compatible with AXG or SXG grip modules
• Not compatible with Icarus Air Polymer grip modules
• Not compatible with Icarus 311 grip modules

Precision Build & Fitment

Each holster is vacuum-formed on precision-machined molds developed from CAD models of the actual firearm. After forming, every unit is trimmed, folded, and finished in-house to ensure consistency and smooth edges.

Final fit and retention testing is performed using the real firearm to confirm proper lockup and reliable draw. Retention can be easily tuned to your personal preference.

This inside waistband holster is engineered for the Sig Sauer P365-FUSE slide when paired with the Icarus Precision A.C.E. 365 “X” MACRO,  A.C.E. 365 "FUSE" MACRO, and  A.C.E. "FUSE" EVO Grip Modules. It provides a secure, comfortable concealed carry solution tailored to these upgraded grip systems.

Not compatible with P365 AXG or SXG grip modules, Norsso slides, or any Icarus Air Polymer grip modules. This holster does support manual safety models.

This holster is designed to work with the factory slide. Any aftermarket slide design variations from the OEM slide dimensions will affect the holster fit and retention.

Holster Features

• Full sweat guard for enhanced comfort
• Adjustable retention
• Cut to clear red dot sights
• Adjustable ride height and cant
• 100% compatible with the Phlster OS Enigma
• Open muzzle to support threaded barrels or compensators
• High sight channel for suppressor-height sights (up to .400 or 10mm)
• Smooth surfaces and rounded edges to reduce hotspots
• Optional Modwing with two inserts to minimize printing and improve draw access
• Available in right- and left-handed configurations
• Proudly made in the USA

Belt Attachments, Mag Pouches & Related Gear

Learn how each belt attachment works in our detailed guide: Inside Waistband Belt & No-Belt Attachment Options Explained

We have a kit available should you need to remove the modwing that includes  (2) 3/8" Screws, (2) 1/4" Rubber Spacers, and (2) 1/4" Threaded Posts which can be purchased HERE.

Complete Your Carry Setup

Complete your concealed carry setup with purpose-built accessories designed for comfort, concealment, and everyday use.

4Bros Holster Wedge — Designed to improve concealment and comfort by helping angle the firearm grip closer to the body while reducing pressure points during IWB carry.

Magazine carriers for these models:

• P365 X-MACRO IWB Magazine Pouch
• P365 X-MACRO OWB Magazine Pouch

Explore all compatible holsters in our Icarus Precision Holster Collection.

Need help selecting a color? View our Holster Color Guide.

*We recommend applying a removable thread locker to all screws upon receipt to prevent hardware loss during use.

FAQs

Will this holster fit the P365 AXG or SXG modules?

No. This holster does not fit AXG or SXG grip modules.

Does the holster support manual safety versions of the P365?

Yes, all compatible P365 models with manual safety are supported.

Does this holster fit Icarus Air Polymer grip modules?

No. The holster is designed only for the aluminum A.C.E. and A.C.E. EVO modules.

Is the holster compatible with Norsso slides?

No, Norsso slide profiles are not supported.

Does the holster clear red dot optics?

Yes. The holster is cut to clear most popular red dot sights.

Is this holster available for left-handed shooters?

Yes. This holster is available in both right- and left-handed configurations. Select your preferred configuration when ordering.

Can I use this holster with threaded barrels or compensators?

Yes. The open-muzzle design accommodates extended barrels and compensators.

What belt attachments do you recommend?

See our full explanation of belt and no-belt options here: IWB Belt Attachment Guide.

• Full Sweat Guard
• Adjustable Retention
• Adjustable Cant
• Profile cut to allow red dot sights
• Open Muzzle for threaded barrels and compensators
• Minimal material and smooth edges
• Made from .093" thermoplastic for durability.
• Optional Modwing includes 2 inserts to allow the user to adjust the amount of leverage placed against the inside of the belt to reduce firearm printing
• Proudly Made in the USA

• Monoblock
• 1 Series Gear Clips
• Ultituck
• Soft Loops 
• RCS Overhooks
• Ulticlip

IWB Belt Attachments Explained

Made in America. Founded, located, engineered, manufactured, and shipped from Northern Indiana.

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