The True Precision Inc Fuse 9mm Barrel for Sig P365 (Part # TPP365FBX / TPP365FBX, UPC 719104542070) is a premium, match-grade drop-in barrel designed to elevate the performance, reliability, and style of your Sig Sauer P365-FUSE platform. Precision machined from USA-sourced 416R stainless steel and measuring 4.30" in length, this non-threaded Fuse barrel delivers enhanced accuracy, improved durability, and a clean, carry-ready profile—perfect for serious concealed carriers and performance-minded shooters.
If you want a high-quality 9mm barrel upgrade for your P365 Fuse without adding threads, comps, or extra length at the muzzle, the True Precision Fuse 4.30" 9mm barrel (TPP365FBX / 719104542070) is an ideal choice.
Purpose-Built for the P365-FUSE Platform
This barrel is specifically engineered for the Sig Sauer P365-FUSE configuration:
Fits: Sig P365-FUSE 4.3" 9mm systems
Designed as a direct, drop-in replacement—no gunsmithing required for most factory-spec slides
Extended to 4.30" to match the Fuse slide profile while maintaining a non-threaded, EDC-friendly muzzle
It’s perfect if you’re running a Fuse slide setup and want a sleek performance barrel without dealing with thread protectors or muzzle devices.
Match-Grade 416R Stainless Steel Construction
At its core, the Fuse barrel uses 416R stainless steel, a top-tier material for precision handgun barrels:
USA-sourced 416R stainless chosen for its excellent machinability and ability to hold tight tolerances
Strong corrosion resistance, especially important for concealed carry guns exposed to sweat, humidity, and daily wear
Provides a solid foundation for excellent accuracy with a wide variety of 9mm ammunition
Whether you’re carrying daily or running high round counts in training, this barrel is built to hold up.
4.30" Non-Threaded Barrel – Clean, Carry-Ready Profile
The 4.30" length is tuned for the Fuse platform:
Slightly longer than a standard P365 barrel, matching the extended Fuse slide configuration
Non-threaded muzzle for a clean, snag-free profile ideal for concealed carry
No thread protector to worry about loosening or catching on holsters or clothing
If you prefer a refined, duty-ready barrel over a comp or suppressor setup, this non-threaded Fuse barrel keeps things simple and reliable.
Precision Rifling & Optimized Twist for 9mm
True Precision barrels are known for their high-performance rifling and tight tolerances:
Proprietary rifling (with a twist rate optimized for 9mm) designed to stabilize common defensive and training loads
Match-style chamber and rifling geometry improve consistency and shot-to-shot repeatability
Built to maximize the inherent accuracy of the P365 platform while maintaining full reliability
You’ll notice tighter groups and more predictable performance, especially with quality 9mm ammunition.
Drop-In Upgrade with Real-World Benefits
Installing the True Precision Fuse barrel is simple:
Field-strip your Sig P365-FUSE.
Remove the factory barrel.
Drop in the TPP365FBX 4.30" Fuse barrel.
Reassemble and perform a standard function check.
No fitting, no special tools—just an immediate upgrade to one of the most critical components of your pistol.
Real-world benefits include:
Potential accuracy improvements versus basic factory barrels
Enhanced corrosion resistance from 416R stainless construction
A smoother overall shooting feel thanks to refined chamber and rifling work
Ideal for EDC, Training, and Performance Builds
This True Precision Fuse barrel is an excellent choice for:
Everyday carry guns – Non-threaded and clean at the muzzle, perfect for holster use and concealment
Training / defensive pistols – Durable and accurate for high round counts and regular range work
Performance-oriented builds – Pairs well with custom slides, optics, and upgraded triggers for a top-tier micro-pistol package
If you want your P365-FUSE to function as both a serious defensive tool and a refined shooter, this barrel is a perfect core upgrade.
Key Features & Specifications – True Precision Fuse 9mm P365 Barrel (TPP365FBX)
Manufacturer: True Precision Inc
Model: Fuse 9mm Barrel for Sig P365
Part Number: TPP365FBX (often listed as TP-P365FB-X)
UPC: 719104542070
Caliber: 9mm Luger (9x19)
Fitment: Sig Sauer P365-FUSE 4.3" 9mm systems (Fuse slide platform)
Length: 4.30" (non-threaded extended profile)
Material: 416R stainless steel (USA-sourced)
Configuration: Drop-in, non-threaded, extended Fuse barrel
Intended Use: Concealed carry, defensive training, range use, and custom/performance builds
Always verify compatibility with your specific slide and frame configuration prior to installation.
Why Choose the True Precision Inc Fuse 9mm 4.30" Barrel for Your P365?
You should choose this barrel if you:
Own a Sig P365-FUSE and want a match-grade, non-threaded barrel that’s ready for serious everyday carry
Prefer a clean muzzle profile over threaded setups, while still gaining the benefits of an extended 4.30" barrel
Want the accuracy, durability, and corrosion resistance of USA-made 416R stainless steel
Are building a performance-oriented micro-compact that still carries comfortably and reliably
For concealed carriers, defensive shooters, and enthusiasts who want the best out of their P365-FUSE without complicating the muzzle end, the True Precision Inc Fuse 9mm Fits Sig P365 4.30" 416R Stainless Steel Barrel (TPP365FBX / 719104542070) is a smart, high-quality upgrade that brings match-level precision to one of the most popular compact platforms on the market.
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