The True Precision Inc Fuse 9mm Barrel for Sig P365, 4.30" 416R Stainless Steel (TPP365FBXG, UPC 719104542100) is a premium, match-grade, drop-in upgrade designed to squeeze every bit of performance out of your Sig Sauer P365-FUSE platform. Built from 416R stainless steel and engineered with True Precision’s signature advanced cuts, chamfers, and enhanced feed ramp geometry, this Fuse barrel delivers improved accuracy, excellent reliability, and a clean, non-threaded, carry-ready profile. Black Market Arms+1
If you want a high-end stainless 9mm barrel for your P365-FUSE without adding threads or flashy coatings, the True Precision TPP365FBXG is a refined, performance-focused choice.
Purpose-Built for the Sig Sauer P365-FUSE Platform
The TPP365FBXG Fuse barrel is specifically designed around the extended P365-FUSE configuration:
Fitment: 4.3" Sig Sauer P365-FUSE 9mm models Black Market Arms+1
Also compatible within the Fuse system for P365 3.1" and P365XL 3.7" builds that use the Fuse slide/barrel combo, according to True Precision’s Fuse product line. Classic Firearms+1
Drop-in ready – designed to install in most factory-spec slides with no gunsmithing required. Black Market Arms+1
Whether you’re running a stock P365-FUSE or building a custom micro-compact with upgraded slide and sights, this barrel is tailored to integrate smoothly.
416R Stainless Steel – Match-Grade Barrel Material
At the core of the TPP365FBXG is 416R stainless steel, the same alloy favored by many top-tier precision barrel makers:
Premium 416R stainless allows extremely precise machining and rifling, which supports excellent accuracy potential. Ammunition Depot+1
Offers strong corrosion resistance, ideal for concealed carry guns exposed to sweat, humidity, and varying climates. Ammunition Depot
Provides a tough, durable barrel that stands up well to regular training and high round counts when properly maintained.
This material gives you the confidence that your barrel is built to perform in the real world, not just look good in product photos.
4.30" Non-Threaded Fuse Length – Clean, Carry-Ready Profile
The 4.30" overall barrel length is specifically tuned for the P365-FUSE slide profile: Ammunition Depot+1
Slightly longer than a standard P365 barrel, matching the extended Fuse slide for a balanced, purposeful look.
Non-threaded muzzle for a smooth, snag-resistant profile that’s ideal for everyday concealed carry—no thread protector to loosen or catch on holsters.
Retains a compact footprint while giving you a bit more effective sight radius and velocity compared to shorter barrels.
If you want a performance-oriented barrel that’s still optimized for discreet carry, this configuration is exactly what you’re after.
Precision Rifling with 1:10" Twist for 9mm Ammunition
True Precision Fuse barrels are engineered to get the most out of standard and premium 9mm loads:
1:10" right-hand twist – a proven twist rate for stabilizing common 9mm bullet weights, from light practice rounds to heavier defensive loads. Ammunition Depot+1
Match-style rifling and chamber geometry are designed to enhance shot-to-shot consistency, helping tighten your groups compared to basic OEM barrels.
Optimized to work well with a wide variety of 9mm ammunition types when used in a properly maintained pistol.
The result is a barrel that lets your P365-FUSE punch above its weight class in terms of practical accuracy.
Advanced Cuts, Chamfers & Feed Ramp – Built for Reliability
True Precision doesn’t just focus on raw accuracy—they also re-engineer key surfaces to outperform factory feeding and reliability:
Advanced cuts and chamfers around locking lugs and hood areas are designed to promote smoother lockup and unlock cycles. Classic Firearms+1
An enhanced feed ramp geometry helps ensure reliable feeding across various bullet profiles, including modern hollow points and defensive loads. Black Market Arms+1
The combination of these features aims to exceed OEM standards, especially under realistic training and carry conditions.
If your P365-FUSE serves defensive, duty, or high-volume training roles, this emphasis on reliability is just as important as the accuracy gains.
Satin Stainless Aesthetic – Clean, Modern, and Custom-Ready
The TPP365FBXG offers the classic stainless barrel look many shooters love:
A satin stainless appearance that adds visual contrast through slide windows or muzzle cuts while maintaining a professional, subdued style. Ammunition Depot+1
Pairs nicely with both black factory slides and custom slides in Cerakote or PVD finishes.
Ideal for those building a refined P365-FUSE that looks as sharp as it shoots, without going to a bright gold or colored finish.
It’s a great choice if you want a custom aesthetic that’s still timeless and carry-appropriate.
Drop-In Installation – Simple, No-Gunsmith Upgrade
True Precision Fuse barrels are designed as drop-in replacements for the P365-FUSE system: Classic Firearms+2Black Market Arms+2
Installation typically requires only a standard field strip and barrel swap.
No permanent modifications, special tools, or fitting are needed for most properly spec’d slides.
Makes it easy to upgrade from a stock barrel to a match-grade stainless unit in just a few minutes.
This simplicity is perfect for shooters who want a noticeable performance upgrade without a complicated build process.
Ideal for EDC, Training, and Performance-Oriented Builds
The True Precision TPP365FBXG Fuse 4.30" barrel is an excellent fit for a wide range of P365-FUSE roles:
Everyday Carry: Non-threaded, clean muzzle profile; stainless construction for corrosion resistance; engineered for reliable feeding of defensive ammo.
Training & Range Use: Match-grade accuracy and 416R durability make it well suited for frequent practice and classes.
Performance Builds: Pairs perfectly with optic-ready slides, upgraded triggers, and enhanced sights for a top-tier micro-compact setup.
Whether your P365-FUSE is a discreet daily companion or a highly refined range pistol, this barrel is built to keep up.
Key Specs – True Precision Fuse 9mm Barrel, P365, 4.30" 416R Stainless (TPP365FBXG)
Based on current retailer and product listings: Vizard's Guns and Ammo+3Pelcher Outdoors+3Black Market Arms+3
Manufacturer: True Precision Inc
Model: Fuse 9mm Barrel for Sig P365
Part Number: TPP365FBXG
UPC: 719104542100
Caliber: 9mm Luger (9x19)
Fitment: Sig Sauer P365-FUSE 4.3" 9mm models; also compatible within the Fuse line for P365 3.1" and P365XL 3.7" slide systems
Length: 4.30" (non-threaded extended Fuse profile)
Material: 416R stainless steel
Finish: Satin / stainless steel
Twist Rate: 1:10" RH
Configuration: Drop-in, non-threaded match-grade barrel
Intended Use: Concealed carry, defensive training, performance/range builds
Always verify specific fitment with your exact P365/FUSE slide and frame configuration before installation.
Why Choose the True Precision TPP365FBXG Fuse 9mm Barrel for Your P365?
You should choose this barrel if you:
Own a Sig P365-FUSE and want a match-grade 416R stainless barrel without threads or flashy finishes.
Prefer a clean, carry-optimized muzzle profile while still gaining the benefits of an extended 4.30" barrel.
Want to upgrade accuracy, reliability, and corrosion resistance over your factory barrel with a drop-in solution.
Are building a refined P365-FUSE that balances everyday practicality with custom, high-performance components.
For concealed carriers, defensive shooters, and enthusiasts who want a serious step up from stock, the True Precision Inc Fuse 9mm Fits Sig P365 4.30" 416R Stainless Steel Barrel (TPP365FBXG / 719104542100) is a smart, high-quality upgrade that brings match-grade precision and stainless durability to one of the most popular micro-compact platforms on the market.
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