Quality product! Outstanding customer service just received Mine 2 days ago would highly recommend
I carry at 3 o'clock and it doesnt work well at that position. However, for appendix carry it does give better concealment.
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🔧 Don't forget Thread Locker — $1.50
Keep your holster hardware secure against vibration and loosening
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FOUR BROTHERS HOLSTERS
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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.
This holster is specifically designed for use with the Icarus Precision ACE 365 311 Grip Module. Proper fit and retention depend on this exact configuration.
Icarus Precision ACE 365 311 FUSE Grip Module
This Outside Waistband (OWB) Duty & Competition holster is engineered specifically for the Icarus Precision ACE 365 311 FUSE grip module paired with factory SIG P365-FUSE slides. Built for USPSA practice, 3-Gun, range days, and light-duty carry where stable belt-mounted performance matters.
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.
Get specifications for the compatible grip module on the Icarus Precision ACE 365 311 FUSE product page.
Once your retention, ride height, and cant are set, apply a removable thread locker to each fastener to help prevent loosening over time.
It’s tuned for light duty, competition practice, and range use, and can serve as a light-duty EDC in an OWB configuration.
Yes. The optic cut clears most popular micro red dots, and the sight channel accommodates suppressor-height sights up to 0.400" (10 mm).
No. This model is purpose-built for the ACE 365 311 FUSE and is not compatible with other Icarus metal or AIR Polymer grip modules.
Yes. This holster is available in both right- and left-handed configurations. Select your preferred configuration when ordering.
Yes. Multiple mounting positions let you fine-tune ride height and cant for your preferred draw and belt-line stance.
Contact our team and we’ll help verify your configuration.
• Outside Waistband Holster specifically designed for USPSA, 3-Gun, Steel Challenge, and other competition shooting sports (May not be IDPA Legal)
• Holster purchase includes one belt attachment, based on your selected option
• Holster Retention is easily adjustable
• Molded with .093" thick thermoplastic for durability
• Profile cut to allow red dot sights
• Open Muzzle for threaded barrels and compensators
• Minimal material and smooth edges
• Proudly Made in the USA
Made in America. Founded, located, engineered, manufactured, and shipped from Northern Indiana.
Please review our Four Brothers Holsters Exchange, Return and Refund Policy
Please review our Four Brothers Holsters Terms of Service

This holster is awesome! Not many options for Icarus precision customizable side cars out there, had never heard of this company prior! Man am I impressed by the overall quality of this holster! Far more adjustable than anything else I’ve tried in this style(Tier1, Trex, LAS). I’m still adjusting to exactly how I like it about 2 weeks in. Only complaint I found is my optic (Swampfox Sentinel 2) did not fit and I did have to remove material around the optic to make it compatible. I know this isn’t a common optic so I wasn’t worried about it at all! Highly recommend you go buy this one
Quality product! Outstanding customer service just received Mine 2 days ago would highly recommend
I carry at 3 o'clock and it doesnt work well at that position. However, for appendix carry it does give better concealment.
Its incredibly comfortable